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Finding the Fourth Proportional to 124,980.38, 172,472.94 and 68,391.75

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Solution

The fourth proportional to 124,980.38, 172,472.94 and 68,391.75 is: 94,380.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,980.38 : 172,472.94 = 68,391.75 : x
  2. Step 2: Convert to fraction form
    124,980.38/172,472.94 = 68,391.75/x
  3. Step 3: Cross multiply
    124,980.38x = 172,472.94 × 68,391.75
  4. Step 4: Simplify right side
    124,980.38x = 11,795,726,194.25
  5. Step 5: Solve for x
    x = 11,795,726,194.25/124,980.38
  6. Step 6: Final answer
    x = 94,380.63

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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.