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Finding the Fourth Proportional to 91,862.60, 137,793.90 and 65,424.20

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Solution

The fourth proportional to 91,862.60, 137,793.90 and 65,424.20 is: 98,136.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,862.60 : 137,793.90 = 65,424.20 : x
  2. Step 2: Convert to fraction form
    91,862.60/137,793.90 = 65,424.20/x
  3. Step 3: Cross multiply
    91,862.60x = 137,793.90 × 65,424.20
  4. Step 4: Simplify right side
    91,862.60x = 9,015,055,672.38
  5. Step 5: Solve for x
    x = 9,015,055,672.38/91,862.60
  6. Step 6: Final answer
    x = 98,136.30

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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.