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Finding the Fourth Proportional to 91,818.60, 137,727.90 and 52,379.70

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Solution

The fourth proportional to 91,818.60, 137,727.90 and 52,379.70 is: 78,569.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,818.60 : 137,727.90 = 52,379.70 : x
  2. Step 2: Convert to fraction form
    91,818.60/137,727.90 = 52,379.70/x
  3. Step 3: Cross multiply
    91,818.60x = 137,727.90 × 52,379.70
  4. Step 4: Simplify right side
    91,818.60x = 7,214,146,083.63
  5. Step 5: Solve for x
    x = 7,214,146,083.63/91,818.60
  6. Step 6: Final answer
    x = 78,569.55

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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.