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Finding the Fourth Proportional to 65,909.70, 98,793.68 and 28,487.50

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Solution

The fourth proportional to 65,909.70, 98,793.68 and 28,487.50 is: 42,700.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,909.70 : 98,793.68 = 28,487.50 : x
  2. Step 2: Convert to fraction form
    65,909.70/98,793.68 = 28,487.50/x
  3. Step 3: Cross multiply
    65,909.70x = 98,793.68 × 28,487.50
  4. Step 4: Simplify right side
    65,909.70x = 2,814,384,569.58
  5. Step 5: Solve for x
    x = 2,814,384,569.58/65,909.70
  6. Step 6: Final answer
    x = 42,700.61

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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.