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Finding the Fourth Proportional to 91,810.60, 137,910.30 and 88,505.80

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Solution

The fourth proportional to 91,810.60, 137,910.30 and 88,505.80 is: 132,946.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,810.60 : 137,910.30 = 88,505.80 : x
  2. Step 2: Convert to fraction form
    91,810.60/137,910.30 = 88,505.80/x
  3. Step 3: Cross multiply
    91,810.60x = 137,910.30 × 88,505.80
  4. Step 4: Simplify right side
    91,810.60x = 12,205,861,429.74
  5. Step 5: Solve for x
    x = 12,205,861,429.74/91,810.60
  6. Step 6: Final answer
    x = 132,946.10

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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.