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Finding the Fourth Proportional to 99,732.60, 149,598.90 and 86,610.60

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Solution

The fourth proportional to 99,732.60, 149,598.90 and 86,610.60 is: 129,915.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,732.60 : 149,598.90 = 86,610.60 : x
  2. Step 2: Convert to fraction form
    99,732.60/149,598.90 = 86,610.60/x
  3. Step 3: Cross multiply
    99,732.60x = 149,598.90 × 86,610.60
  4. Step 4: Simplify right side
    99,732.60x = 12,956,850,488.34
  5. Step 5: Solve for x
    x = 12,956,850,488.34/99,732.60
  6. Step 6: Final answer
    x = 129,915.90

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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.