Home / 72,513.28-108,691.26-28,126.90

Finding the Fourth Proportional to 72,513.28, 108,691.26 and 28,126.90

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Solution

The fourth proportional to 72,513.28, 108,691.26 and 28,126.90 is: 42,159.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,513.28 : 108,691.26 = 28,126.90 : x
  2. Step 2: Convert to fraction form
    72,513.28/108,691.26 = 28,126.90/x
  3. Step 3: Cross multiply
    72,513.28x = 108,691.26 × 28,126.90
  4. Step 4: Simplify right side
    72,513.28x = 3,057,148,200.89
  5. Step 5: Solve for x
    x = 3,057,148,200.89/72,513.28
  6. Step 6: Final answer
    x = 42,159.84

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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.