Home / 129,788.18-179,108.09-72,429.92

Finding the Fourth Proportional to 129,788.18, 179,108.09 and 72,429.92

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Solution

The fourth proportional to 129,788.18, 179,108.09 and 72,429.92 is: 99,953.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,788.18 : 179,108.09 = 72,429.92 : x
  2. Step 2: Convert to fraction form
    129,788.18/179,108.09 = 72,429.92/x
  3. Step 3: Cross multiply
    129,788.18x = 179,108.09 × 72,429.92
  4. Step 4: Simplify right side
    129,788.18x = 12,972,785,187.31
  5. Step 5: Solve for x
    x = 12,972,785,187.31/129,788.18
  6. Step 6: Final answer
    x = 99,953.52

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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.