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Finding the Fourth Proportional to 124,687.62, 172,063.98 and 68,099.40

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Solution

The fourth proportional to 124,687.62, 172,063.98 and 68,099.40 is: 93,974.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,687.62 : 172,063.98 = 68,099.40 : x
  2. Step 2: Convert to fraction form
    124,687.62/172,063.98 = 68,099.40/x
  3. Step 3: Cross multiply
    124,687.62x = 172,063.98 × 68,099.40
  4. Step 4: Simplify right side
    124,687.62x = 11,717,453,799.61
  5. Step 5: Solve for x
    x = 11,717,453,799.61/124,687.62
  6. Step 6: Final answer
    x = 93,974.48

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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.