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Finding the Fourth Proportional to 122,750.45, 169,338.42 and 79,726.89

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Solution

The fourth proportional to 122,750.45, 169,338.42 and 79,726.89 is: 109,985.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,750.45 : 169,338.42 = 79,726.89 : x
  2. Step 2: Convert to fraction form
    122,750.45/169,338.42 = 79,726.89/x
  3. Step 3: Cross multiply
    122,750.45x = 169,338.42 × 79,726.89
  4. Step 4: Simplify right side
    122,750.45x = 13,500,825,584.11
  5. Step 5: Solve for x
    x = 13,500,825,584.11/122,750.45
  6. Step 6: Final answer
    x = 109,985.96

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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.