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Finding the Fourth Proportional to 122,418, 168,939.99 and 68,707.17

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Solution

The fourth proportional to 122,418, 168,939.99 and 68,707.17 is: 94,817.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,418 : 168,939.99 = 68,707.17 : x
  2. Step 2: Convert to fraction form
    122,418/168,939.99 = 68,707.17/x
  3. Step 3: Cross multiply
    122,418x = 168,939.99 × 68,707.17
  4. Step 4: Simplify right side
    122,418x = 11,607,388,612.73
  5. Step 5: Solve for x
    x = 11,607,388,612.73/122,418
  6. Step 6: Final answer
    x = 94,817.66

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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.