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Finding the Fourth Proportional to 99,965.60, 149,729.70 and 88,884.80

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Solution

The fourth proportional to 99,965.60, 149,729.70 and 88,884.80 is: 133,132.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,965.60 : 149,729.70 = 88,884.80 : x
  2. Step 2: Convert to fraction form
    99,965.60/149,729.70 = 88,884.80/x
  3. Step 3: Cross multiply
    99,965.60x = 149,729.70 × 88,884.80
  4. Step 4: Simplify right side
    99,965.60x = 13,308,694,438.56
  5. Step 5: Solve for x
    x = 13,308,694,438.56/99,965.60
  6. Step 6: Final answer
    x = 133,132.74

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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.