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Finding the Fourth Proportional to 129,527.80, 193,902.90 and 76,910.20

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Solution

The fourth proportional to 129,527.80, 193,902.90 and 76,910.20 is: 115,134.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,527.80 : 193,902.90 = 76,910.20 : x
  2. Step 2: Convert to fraction form
    129,527.80/193,902.90 = 76,910.20/x
  3. Step 3: Cross multiply
    129,527.80x = 193,902.90 × 76,910.20
  4. Step 4: Simplify right side
    129,527.80x = 14,913,110,819.58
  5. Step 5: Solve for x
    x = 14,913,110,819.58/129,527.80
  6. Step 6: Final answer
    x = 115,134.44

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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.