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Finding the Fourth Proportional to 91,993.20, 137,819.70 and 52,432.80

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Solution

The fourth proportional to 91,993.20, 137,819.70 and 52,432.80 is: 78,552.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,993.20 : 137,819.70 = 52,432.80 : x
  2. Step 2: Convert to fraction form
    91,993.20/137,819.70 = 52,432.80/x
  3. Step 3: Cross multiply
    91,993.20x = 137,819.70 × 52,432.80
  4. Step 4: Simplify right side
    91,993.20x = 7,226,272,766.16
  5. Step 5: Solve for x
    x = 7,226,272,766.16/91,993.20
  6. Step 6: Final answer
    x = 78,552.25

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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.