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Finding the Fourth Proportional to 122,626.36, 169,218.92 and 71,643.80

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Solution

The fourth proportional to 122,626.36, 169,218.92 and 71,643.80 is: 98,865.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,626.36 : 169,218.92 = 71,643.80 : x
  2. Step 2: Convert to fraction form
    122,626.36/169,218.92 = 71,643.80/x
  3. Step 3: Cross multiply
    122,626.36x = 169,218.92 × 71,643.80
  4. Step 4: Simplify right side
    122,626.36x = 12,123,486,102.48
  5. Step 5: Solve for x
    x = 12,123,486,102.48/122,626.36
  6. Step 6: Final answer
    x = 98,865.26

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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.