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Finding the Fourth Proportional to 122,585.84, 169,172.82 and 68,869.78

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Solution

The fourth proportional to 122,585.84, 169,172.82 and 68,869.78 is: 95,042.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,585.84 : 169,172.82 = 68,869.78 : x
  2. Step 2: Convert to fraction form
    122,585.84/169,172.82 = 68,869.78/x
  3. Step 3: Cross multiply
    122,585.84x = 169,172.82 × 68,869.78
  4. Step 4: Simplify right side
    122,585.84x = 11,650,894,895.38
  5. Step 5: Solve for x
    x = 11,650,894,895.38/122,585.84
  6. Step 6: Final answer
    x = 95,042.75

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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.