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Finding the Fourth Proportional to 91,909.60, 137,864.40 and 52,470.70

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Solution

The fourth proportional to 91,909.60, 137,864.40 and 52,470.70 is: 78,706.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,909.60 : 137,864.40 = 52,470.70 : x
  2. Step 2: Convert to fraction form
    91,909.60/137,864.40 = 52,470.70/x
  3. Step 3: Cross multiply
    91,909.60x = 137,864.40 × 52,470.70
  4. Step 4: Simplify right side
    91,909.60x = 7,233,841,573.08
  5. Step 5: Solve for x
    x = 7,233,841,573.08/91,909.60
  6. Step 6: Final answer
    x = 78,706.05

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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.