Home / 129,697.90-178,979.46-72,338.96

Finding the Fourth Proportional to 129,697.90, 178,979.46 and 72,338.96

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Solution

The fourth proportional to 129,697.90, 178,979.46 and 72,338.96 is: 99,825.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,697.90 : 178,979.46 = 72,338.96 : x
  2. Step 2: Convert to fraction form
    129,697.90/178,979.46 = 72,338.96/x
  3. Step 3: Cross multiply
    129,697.90x = 178,979.46 × 72,338.96
  4. Step 4: Simplify right side
    129,697.90x = 12,947,187,997.76
  5. Step 5: Solve for x
    x = 12,947,187,997.76/129,697.90
  6. Step 6: Final answer
    x = 99,825.73

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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.