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Finding the Fourth Proportional to 91,500.60, 137,469.60 and 81,877.80

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Solution

The fourth proportional to 91,500.60, 137,469.60 and 81,877.80 is: 123,012.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,500.60 : 137,469.60 = 81,877.80 : x
  2. Step 2: Convert to fraction form
    91,500.60/137,469.60 = 81,877.80/x
  3. Step 3: Cross multiply
    91,500.60x = 137,469.60 × 81,877.80
  4. Step 4: Simplify right side
    91,500.60x = 11,255,708,414.88
  5. Step 5: Solve for x
    x = 11,255,708,414.88/91,500.60
  6. Step 6: Final answer
    x = 123,012.40

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1.5x scale

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.