Home / 129,780.31-179,103.62-76,082.58

Finding the Fourth Proportional to 129,780.31, 179,103.62 and 76,082.58

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Solution

The fourth proportional to 129,780.31, 179,103.62 and 76,082.58 is: 104,997.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,780.31 : 179,103.62 = 76,082.58 : x
  2. Step 2: Convert to fraction form
    129,780.31/179,103.62 = 76,082.58/x
  3. Step 3: Cross multiply
    129,780.31x = 179,103.62 × 76,082.58
  4. Step 4: Simplify right side
    129,780.31x = 13,626,665,496.94
  5. Step 5: Solve for x
    x = 13,626,665,496.94/129,780.31
  6. Step 6: Final answer
    x = 104,997.94

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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.