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Finding the Fourth Proportional to 122,775.79, 169,438.34 and 74,410.97

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Solution

The fourth proportional to 122,775.79, 169,438.34 and 74,410.97 is: 102,691.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,775.79 : 169,438.34 = 74,410.97 : x
  2. Step 2: Convert to fraction form
    122,775.79/169,438.34 = 74,410.97/x
  3. Step 3: Cross multiply
    122,775.79x = 169,438.34 × 74,410.97
  4. Step 4: Simplify right side
    122,775.79x = 12,608,070,445.46
  5. Step 5: Solve for x
    x = 12,608,070,445.46/122,775.79
  6. Step 6: Final answer
    x = 102,691.83

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1.5x scale

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.