Home / 128,669.92-177,589.74-77,691.04

Finding the Fourth Proportional to 128,669.92, 177,589.74 and 77,691.04

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Solution

The fourth proportional to 128,669.92, 177,589.74 and 77,691.04 is: 107,228.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,669.92 : 177,589.74 = 77,691.04 : x
  2. Step 2: Convert to fraction form
    128,669.92/177,589.74 = 77,691.04/x
  3. Step 3: Cross multiply
    128,669.92x = 177,589.74 × 77,691.04
  4. Step 4: Simplify right side
    128,669.92x = 13,797,131,593.93
  5. Step 5: Solve for x
    x = 13,797,131,593.93/128,669.92
  6. Step 6: Final answer
    x = 107,228.88

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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.