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Finding the Fourth Proportional to 123,863.92, 171,003.02 and 81,545.46

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Solution

The fourth proportional to 123,863.92, 171,003.02 and 81,545.46 is: 112,579.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,863.92 : 171,003.02 = 81,545.46 : x
  2. Step 2: Convert to fraction form
    123,863.92/171,003.02 = 81,545.46/x
  3. Step 3: Cross multiply
    123,863.92x = 171,003.02 × 81,545.46
  4. Step 4: Simplify right side
    123,863.92x = 13,944,519,927.29
  5. Step 5: Solve for x
    x = 13,944,519,927.29/123,863.92
  6. Step 6: Final answer
    x = 112,579.35

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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.