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Finding the Fourth Proportional to 122,887.60, 169,584.92 and 71,910.13

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Solution

The fourth proportional to 122,887.60, 169,584.92 and 71,910.13 is: 99,236.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,887.60 : 169,584.92 = 71,910.13 : x
  2. Step 2: Convert to fraction form
    122,887.60/169,584.92 = 71,910.13/x
  3. Step 3: Cross multiply
    122,887.60x = 169,584.92 × 71,910.13
  4. Step 4: Simplify right side
    122,887.60x = 12,194,873,399.05
  5. Step 5: Solve for x
    x = 12,194,873,399.05/122,887.60
  6. Step 6: Final answer
    x = 99,236.00

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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.