Home / 129,972.39-179,287.08-78,253.53

Finding the Fourth Proportional to 129,972.39, 179,287.08 and 78,253.53

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Solution

The fourth proportional to 129,972.39, 179,287.08 and 78,253.53 is: 107,944.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,972.39 : 179,287.08 = 78,253.53 : x
  2. Step 2: Convert to fraction form
    129,972.39/179,287.08 = 78,253.53/x
  3. Step 3: Cross multiply
    129,972.39x = 179,287.08 × 78,253.53
  4. Step 4: Simplify right side
    129,972.39x = 14,029,846,893.39
  5. Step 5: Solve for x
    x = 14,029,846,893.39/129,972.39
  6. Step 6: Final answer
    x = 107,944.83

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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.