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Finding the Fourth Proportional to 122,703.52, 169,286.80 and 80,286.68

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Solution

The fourth proportional to 122,703.52, 169,286.80 and 80,286.68 is: 110,766.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,703.52 : 169,286.80 = 80,286.68 : x
  2. Step 2: Convert to fraction form
    122,703.52/169,286.80 = 80,286.68/x
  3. Step 3: Cross multiply
    122,703.52x = 169,286.80 × 80,286.68
  4. Step 4: Simplify right side
    122,703.52x = 13,591,475,139.82
  5. Step 5: Solve for x
    x = 13,591,475,139.82/122,703.52
  6. Step 6: Final answer
    x = 110,766.79

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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.