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Finding the Fourth Proportional to 112,940.90, 169,327.10 and 67,951.72

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Solution

The fourth proportional to 112,940.90, 169,327.10 and 67,951.72 is: 101,876.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,940.90 : 169,327.10 = 67,951.72 : x
  2. Step 2: Convert to fraction form
    112,940.90/169,327.10 = 67,951.72/x
  3. Step 3: Cross multiply
    112,940.90x = 169,327.10 × 67,951.72
  4. Step 4: Simplify right side
    112,940.90x = 11,506,068,069.15
  5. Step 5: Solve for x
    x = 11,506,068,069.15/112,940.90
  6. Step 6: Final answer
    x = 101,876.89

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.