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Finding the Fourth Proportional to 124,434, 171,718.92 and 79,724.88

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Solution

The fourth proportional to 124,434, 171,718.92 and 79,724.88 is: 110,020.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,434 : 171,718.92 = 79,724.88 : x
  2. Step 2: Convert to fraction form
    124,434/171,718.92 = 79,724.88/x
  3. Step 3: Cross multiply
    124,434x = 171,718.92 × 79,724.88
  4. Step 4: Simplify right side
    124,434x = 13,690,270,290.73
  5. Step 5: Solve for x
    x = 13,690,270,290.73/124,434
  6. Step 6: Final answer
    x = 110,020.33

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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.