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Finding the Fourth Proportional to 99,785.60, 149,459.70 and 88,704.80

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Solution

The fourth proportional to 99,785.60, 149,459.70 and 88,704.80 is: 132,862.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,785.60 : 149,459.70 = 88,704.80 : x
  2. Step 2: Convert to fraction form
    99,785.60/149,459.70 = 88,704.80/x
  3. Step 3: Cross multiply
    99,785.60x = 149,459.70 × 88,704.80
  4. Step 4: Simplify right side
    99,785.60x = 13,257,792,796.56
  5. Step 5: Solve for x
    x = 13,257,792,796.56/99,785.60
  6. Step 6: Final answer
    x = 132,862.79

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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.