Home / 129,872.80-179,254.30-76,175.11

Finding the Fourth Proportional to 129,872.80, 179,254.30 and 76,175.11

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Solution

The fourth proportional to 129,872.80, 179,254.30 and 76,175.11 is: 105,139.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,872.80 : 179,254.30 = 76,175.11 : x
  2. Step 2: Convert to fraction form
    129,872.80/179,254.30 = 76,175.11/x
  3. Step 3: Cross multiply
    129,872.80x = 179,254.30 × 76,175.11
  4. Step 4: Simplify right side
    129,872.80x = 13,654,716,020.47
  5. Step 5: Solve for x
    x = 13,654,716,020.47/129,872.80
  6. Step 6: Final answer
    x = 105,139.15

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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.