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Finding the Fourth Proportional to 122,702.52, 169,285.42 and 80,285.68

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Solution

The fourth proportional to 122,702.52, 169,285.42 and 80,285.68 is: 110,765.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,702.52 : 169,285.42 = 80,285.68 : x
  2. Step 2: Convert to fraction form
    122,702.52/169,285.42 = 80,285.68/x
  3. Step 3: Cross multiply
    122,702.52x = 169,285.42 × 80,285.68
  4. Step 4: Simplify right side
    122,702.52x = 13,591,195,058.79
  5. Step 5: Solve for x
    x = 13,591,195,058.79/122,702.52
  6. Step 6: Final answer
    x = 110,765.41

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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.