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Finding the Fourth Proportional to 122,915.66, 169,669.50 and 71,944.52

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Solution

The fourth proportional to 122,915.66, 169,669.50 and 71,944.52 is: 99,310.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,915.66 : 169,669.50 = 71,944.52 : x
  2. Step 2: Convert to fraction form
    122,915.66/169,669.50 = 71,944.52/x
  3. Step 3: Cross multiply
    122,915.66x = 169,669.50 × 71,944.52
  4. Step 4: Simplify right side
    122,915.66x = 12,206,790,736.14
  5. Step 5: Solve for x
    x = 12,206,790,736.14/122,915.66
  6. Step 6: Final answer
    x = 99,310.30

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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.