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Finding the Fourth Proportional to 508,071.52, 762,107.60 and 129,020.64

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Solution

The fourth proportional to 508,071.52, 762,107.60 and 129,020.64 is: 193,531.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    508,071.52 : 762,107.60 = 129,020.64 : x
  2. Step 2: Convert to fraction form
    508,071.52/762,107.60 = 129,020.64/x
  3. Step 3: Cross multiply
    508,071.52x = 762,107.60 × 129,020.64
  4. Step 4: Simplify right side
    508,071.52x = 98,327,610,300.86
  5. Step 5: Solve for x
    x = 98,327,610,300.86/508,071.52
  6. Step 6: Final answer
    x = 193,531.04

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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.