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Finding the Fourth Proportional to 45,613.80, 68,420.70 and 20,644.20

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Solution

The fourth proportional to 45,613.80, 68,420.70 and 20,644.20 is: 30,966.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,613.80 : 68,420.70 = 20,644.20 : x
  2. Step 2: Convert to fraction form
    45,613.80/68,420.70 = 20,644.20/x
  3. Step 3: Cross multiply
    45,613.80x = 68,420.70 × 20,644.20
  4. Step 4: Simplify right side
    45,613.80x = 1,412,490,614.94
  5. Step 5: Solve for x
    x = 1,412,490,614.94/45,613.80
  6. Step 6: Final answer
    x = 30,966.30

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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.