Home / 129,896.46-179,237.90-78,882.66

Finding the Fourth Proportional to 129,896.46, 179,237.90 and 78,882.66

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Solution

The fourth proportional to 129,896.46, 179,237.90 and 78,882.66 is: 108,846.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,896.46 : 179,237.90 = 78,882.66 : x
  2. Step 2: Convert to fraction form
    129,896.46/179,237.90 = 78,882.66/x
  3. Step 3: Cross multiply
    129,896.46x = 179,237.90 × 78,882.66
  4. Step 4: Simplify right side
    129,896.46x = 14,138,761,930.40
  5. Step 5: Solve for x
    x = 14,138,761,930.40/129,896.46
  6. Step 6: Final answer
    x = 108,846.40

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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.