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Finding the Fourth Proportional to 60,209.52, 90,308.52 and 20,761.20

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Solution

The fourth proportional to 60,209.52, 90,308.52 and 20,761.20 is: 31,139.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,209.52 : 90,308.52 = 20,761.20 : x
  2. Step 2: Convert to fraction form
    60,209.52/90,308.52 = 20,761.20/x
  3. Step 3: Cross multiply
    60,209.52x = 90,308.52 × 20,761.20
  4. Step 4: Simplify right side
    60,209.52x = 1,874,913,245.42
  5. Step 5: Solve for x
    x = 1,874,913,245.42/60,209.52
  6. Step 6: Final answer
    x = 31,139.81

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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.