Home / 30,343,123.40-45,514,685.10-20,139,456.20

Finding the Fourth Proportional to 30,343,123.40, 45,514,685.10 and 20,139,456.20

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Solution

The fourth proportional to 30,343,123.40, 45,514,685.10 and 20,139,456.20 is: 30,209,184.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,343,123.40 : 45,514,685.10 = 20,139,456.20 : x
  2. Step 2: Convert to fraction form
    30,343,123.40/45,514,685.10 = 20,139,456.20/x
  3. Step 3: Cross multiply
    30,343,123.40x = 45,514,685.10 × 20,139,456.20
  4. Step 4: Simplify right side
    30,343,123.40x = 916,641,007,028,242.62
  5. Step 5: Solve for x
    x = 916,641,007,028,242.62/30,343,123.40
  6. Step 6: Final answer
    x = 30,209,184.30

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.