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Finding the Fourth Proportional to 124,534.90, 171,806.16 and 81,524.91

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Solution

The fourth proportional to 124,534.90, 171,806.16 and 81,524.91 is: 112,470.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,534.90 : 171,806.16 = 81,524.91 : x
  2. Step 2: Convert to fraction form
    124,534.90/171,806.16 = 81,524.91/x
  3. Step 3: Cross multiply
    124,534.90x = 171,806.16 × 81,524.91
  4. Step 4: Simplify right side
    124,534.90x = 14,006,481,731.45
  5. Step 5: Solve for x
    x = 14,006,481,731.45/124,534.90
  6. Step 6: Final answer
    x = 112,470.33

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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.