Home / 257,721.15-386,489.10-89,195.76

Finding the Fourth Proportional to 257,721.15, 386,489.10 and 89,195.76

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Solution

The fourth proportional to 257,721.15, 386,489.10 and 89,195.76 is: 133,761.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,721.15 : 386,489.10 = 89,195.76 : x
  2. Step 2: Convert to fraction form
    257,721.15/386,489.10 = 89,195.76/x
  3. Step 3: Cross multiply
    257,721.15x = 386,489.10 × 89,195.76
  4. Step 4: Simplify right side
    257,721.15x = 34,473,189,006.22
  5. Step 5: Solve for x
    x = 34,473,189,006.22/257,721.15
  6. Step 6: Final answer
    x = 133,761.58

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.