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Finding the Fourth Proportional to 123,843.36, 170,875.92 and 83,630.88

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Solution

The fourth proportional to 123,843.36, 170,875.92 and 83,630.88 is: 115,391.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,843.36 : 170,875.92 = 83,630.88 : x
  2. Step 2: Convert to fraction form
    123,843.36/170,875.92 = 83,630.88/x
  3. Step 3: Cross multiply
    123,843.36x = 170,875.92 × 83,630.88
  4. Step 4: Simplify right side
    123,843.36x = 14,290,503,560.41
  5. Step 5: Solve for x
    x = 14,290,503,560.41/123,843.36
  6. Step 6: Final answer
    x = 115,391.76

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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.