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Finding the Fourth Proportional to 124,795.71, 172,198.17 and 71,081.78

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Solution

The fourth proportional to 124,795.71, 172,198.17 and 71,081.78 is: 98,081.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,795.71 : 172,198.17 = 71,081.78 : x
  2. Step 2: Convert to fraction form
    124,795.71/172,198.17 = 71,081.78/x
  3. Step 3: Cross multiply
    124,795.71x = 172,198.17 × 71,081.78
  4. Step 4: Simplify right side
    124,795.71x = 12,240,151,575.35
  5. Step 5: Solve for x
    x = 12,240,151,575.35/124,795.71
  6. Step 6: Final answer
    x = 98,081.51

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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.