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Finding the Fourth Proportional to 252,001.30, 378,001.95 and 85,789.30

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Solution

The fourth proportional to 252,001.30, 378,001.95 and 85,789.30 is: 128,683.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    252,001.30 : 378,001.95 = 85,789.30 : x
  2. Step 2: Convert to fraction form
    252,001.30/378,001.95 = 85,789.30/x
  3. Step 3: Cross multiply
    252,001.30x = 378,001.95 × 85,789.30
  4. Step 4: Simplify right side
    252,001.30x = 32,428,522,689.14
  5. Step 5: Solve for x
    x = 32,428,522,689.14/252,001.30
  6. Step 6: Final answer
    x = 128,683.95

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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.