Home / 129,943.92-179,338.17-78,964.98

Finding the Fourth Proportional to 129,943.92, 179,338.17 and 78,964.98

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Solution

The fourth proportional to 129,943.92, 179,338.17 and 78,964.98 is: 108,981.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,943.92 : 179,338.17 = 78,964.98 : x
  2. Step 2: Convert to fraction form
    129,943.92/179,338.17 = 78,964.98/x
  3. Step 3: Cross multiply
    129,943.92x = 179,338.17 × 78,964.98
  4. Step 4: Simplify right side
    129,943.92x = 14,161,435,007.29
  5. Step 5: Solve for x
    x = 14,161,435,007.29/129,943.92
  6. Step 6: Final answer
    x = 108,981.13

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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.