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Finding the Fourth Proportional to 132,679.80, 199,019.70 and 80,191.80

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Solution

The fourth proportional to 132,679.80, 199,019.70 and 80,191.80 is: 120,287.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    132,679.80 : 199,019.70 = 80,191.80 : x
  2. Step 2: Convert to fraction form
    132,679.80/199,019.70 = 80,191.80/x
  3. Step 3: Cross multiply
    132,679.80x = 199,019.70 × 80,191.80
  4. Step 4: Simplify right side
    132,679.80x = 15,959,747,978.46
  5. Step 5: Solve for x
    x = 15,959,747,978.46/132,679.80
  6. Step 6: Final answer
    x = 120,287.70

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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.