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Finding the Fourth Proportional to 123,113.17, 169,910.69 and 68,673.92

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Solution

The fourth proportional to 123,113.17, 169,910.69 and 68,673.92 is: 94,778.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,113.17 : 169,910.69 = 68,673.92 : x
  2. Step 2: Convert to fraction form
    123,113.17/169,910.69 = 68,673.92/x
  3. Step 3: Cross multiply
    123,113.17x = 169,910.69 × 68,673.92
  4. Step 4: Simplify right side
    123,113.17x = 11,668,432,515.39
  5. Step 5: Solve for x
    x = 11,668,432,515.39/123,113.17
  6. Step 6: Final answer
    x = 94,778.10

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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.