Home / 129,872.46-179,193.56-78,883.77

Finding the Fourth Proportional to 129,872.46, 179,193.56 and 78,883.77

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Solution

The fourth proportional to 129,872.46, 179,193.56 and 78,883.77 is: 108,841.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,872.46 : 179,193.56 = 78,883.77 : x
  2. Step 2: Convert to fraction form
    129,872.46/179,193.56 = 78,883.77/x
  3. Step 3: Cross multiply
    129,872.46x = 179,193.56 × 78,883.77
  4. Step 4: Simplify right side
    129,872.46x = 14,135,463,572.52
  5. Step 5: Solve for x
    x = 14,135,463,572.52/129,872.46
  6. Step 6: Final answer
    x = 108,841.12

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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.