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Finding the Fourth Proportional to 87,655.80, 120,834.54 and 62,124.60

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Solution

The fourth proportional to 87,655.80, 120,834.54 and 62,124.60 is: 85,639.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,655.80 : 120,834.54 = 62,124.60 : x
  2. Step 2: Convert to fraction form
    87,655.80/120,834.54 = 62,124.60/x
  3. Step 3: Cross multiply
    87,655.80x = 120,834.54 × 62,124.60
  4. Step 4: Simplify right side
    87,655.80x = 7,506,797,463.68
  5. Step 5: Solve for x
    x = 7,506,797,463.68/87,655.80
  6. Step 6: Final answer
    x = 85,639.48

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.