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Finding the Fourth Proportional to 91,764.60, 137,646.90 and 88,265.40

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Solution

The fourth proportional to 91,764.60, 137,646.90 and 88,265.40 is: 132,398.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,764.60 : 137,646.90 = 88,265.40 : x
  2. Step 2: Convert to fraction form
    91,764.60/137,646.90 = 88,265.40/x
  3. Step 3: Cross multiply
    91,764.60x = 137,646.90 × 88,265.40
  4. Step 4: Simplify right side
    91,764.60x = 12,149,458,687.26
  5. Step 5: Solve for x
    x = 12,149,458,687.26/91,764.60
  6. Step 6: Final answer
    x = 132,398.10

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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.