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Finding the Fourth Proportional to 122,686.58, 169,294.57 and 68,229.95

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Solution

The fourth proportional to 122,686.58, 169,294.57 and 68,229.95 is: 94,150.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,686.58 : 169,294.57 = 68,229.95 : x
  2. Step 2: Convert to fraction form
    122,686.58/169,294.57 = 68,229.95/x
  3. Step 3: Cross multiply
    122,686.58x = 169,294.57 × 68,229.95
  4. Step 4: Simplify right side
    122,686.58x = 11,550,959,029.32
  5. Step 5: Solve for x
    x = 11,550,959,029.32/122,686.58
  6. Step 6: Final answer
    x = 94,150.14

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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.