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Finding the Fourth Proportional to 252,030.20, 378,045.30 and 85,818.20

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Solution

The fourth proportional to 252,030.20, 378,045.30 and 85,818.20 is: 128,727.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    252,030.20 : 378,045.30 = 85,818.20 : x
  2. Step 2: Convert to fraction form
    252,030.20/378,045.30 = 85,818.20/x
  3. Step 3: Cross multiply
    252,030.20x = 378,045.30 × 85,818.20
  4. Step 4: Simplify right side
    252,030.20x = 32,443,167,164.46
  5. Step 5: Solve for x
    x = 32,443,167,164.46/252,030.20
  6. Step 6: Final answer
    x = 128,727.30

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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.