Home / 99,760.80-149,209.20-89,306.40

Finding the Fourth Proportional to 99,760.80, 149,209.20 and 89,306.40

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Solution

The fourth proportional to 99,760.80, 149,209.20 and 89,306.40 is: 133,572.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,760.80 : 149,209.20 = 89,306.40 : x
  2. Step 2: Convert to fraction form
    99,760.80/149,209.20 = 89,306.40/x
  3. Step 3: Cross multiply
    99,760.80x = 149,209.20 × 89,306.40
  4. Step 4: Simplify right side
    99,760.80x = 13,325,336,498.88
  5. Step 5: Solve for x
    x = 13,325,336,498.88/99,760.80
  6. Step 6: Final answer
    x = 133,572.87

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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.