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Finding the Fourth Proportional to 87,929.28, 131,866.08 and 28,751.28

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Solution

The fourth proportional to 87,929.28, 131,866.08 and 28,751.28 is: 43,117.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,929.28 : 131,866.08 = 28,751.28 : x
  2. Step 2: Convert to fraction form
    87,929.28/131,866.08 = 28,751.28/x
  3. Step 3: Cross multiply
    87,929.28x = 131,866.08 × 28,751.28
  4. Step 4: Simplify right side
    87,929.28x = 3,791,318,588.58
  5. Step 5: Solve for x
    x = 3,791,318,588.58/87,929.28
  6. Step 6: Final answer
    x = 43,117.82

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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.