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Finding the Fourth Proportional to 122,635.68, 169,238.36 and 74,238.72

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Solution

The fourth proportional to 122,635.68, 169,238.36 and 74,238.72 is: 102,450.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,635.68 : 169,238.36 = 74,238.72 : x
  2. Step 2: Convert to fraction form
    122,635.68/169,238.36 = 74,238.72/x
  3. Step 3: Cross multiply
    122,635.68x = 169,238.36 × 74,238.72
  4. Step 4: Simplify right side
    122,635.68x = 12,564,039,221.30
  5. Step 5: Solve for x
    x = 12,564,039,221.30/122,635.68
  6. Step 6: Final answer
    x = 102,450.11

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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.