Home / 129,789.24-179,108.82-72,427.96

Finding the Fourth Proportional to 129,789.24, 179,108.82 and 72,427.96

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Solution

The fourth proportional to 129,789.24, 179,108.82 and 72,427.96 is: 99,950.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,789.24 : 179,108.82 = 72,427.96 : x
  2. Step 2: Convert to fraction form
    129,789.24/179,108.82 = 72,427.96/x
  3. Step 3: Cross multiply
    129,789.24x = 179,108.82 × 72,427.96
  4. Step 4: Simplify right side
    129,789.24x = 12,972,486,450.61
  5. Step 5: Solve for x
    x = 12,972,486,450.61/129,789.24
  6. Step 6: Final answer
    x = 99,950.40

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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.