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Finding the Fourth Proportional to 129,757.39, 179,065.23 and 73,168.78

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Solution

The fourth proportional to 129,757.39, 179,065.23 and 73,168.78 is: 100,972.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,757.39 : 179,065.23 = 73,168.78 : x
  2. Step 2: Convert to fraction form
    129,757.39/179,065.23 = 73,168.78/x
  3. Step 3: Cross multiply
    129,757.39x = 179,065.23 × 73,168.78
  4. Step 4: Simplify right side
    129,757.39x = 13,101,984,419.52
  5. Step 5: Solve for x
    x = 13,101,984,419.52/129,757.39
  6. Step 6: Final answer
    x = 100,972.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.