Home / 129,788.87-179,108.30-72,427.58

Finding the Fourth Proportional to 129,788.87, 179,108.30 and 72,427.58

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Solution

The fourth proportional to 129,788.87, 179,108.30 and 72,427.58 is: 99,949.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,788.87 : 179,108.30 = 72,427.58 : x
  2. Step 2: Convert to fraction form
    129,788.87/179,108.30 = 72,427.58/x
  3. Step 3: Cross multiply
    129,788.87x = 179,108.30 × 72,427.58
  4. Step 4: Simplify right side
    129,788.87x = 12,972,380,726.91
  5. Step 5: Solve for x
    x = 12,972,380,726.91/129,788.87
  6. Step 6: Final answer
    x = 99,949.87

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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.