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Finding the Fourth Proportional to 91,654.60, 137,481.90 and 86,816.20

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Solution

The fourth proportional to 91,654.60, 137,481.90 and 86,816.20 is: 130,224.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,654.60 : 137,481.90 = 86,816.20 : x
  2. Step 2: Convert to fraction form
    91,654.60/137,481.90 = 86,816.20/x
  3. Step 3: Cross multiply
    91,654.60x = 137,481.90 × 86,816.20
  4. Step 4: Simplify right side
    91,654.60x = 11,935,656,126.78
  5. Step 5: Solve for x
    x = 11,935,656,126.78/91,654.60
  6. Step 6: Final answer
    x = 130,224.30

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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.