Home / 123,876.68-170,973.79-80,781.35

Finding the Fourth Proportional to 123,876.68, 170,973.79 and 80,781.35

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Solution

The fourth proportional to 123,876.68, 170,973.79 and 80,781.35 is: 111,493.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,876.68 : 170,973.79 = 80,781.35 : x
  2. Step 2: Convert to fraction form
    123,876.68/170,973.79 = 80,781.35/x
  3. Step 3: Cross multiply
    123,876.68x = 170,973.79 × 80,781.35
  4. Step 4: Simplify right side
    123,876.68x = 13,811,493,166.91
  5. Step 5: Solve for x
    x = 13,811,493,166.91/123,876.68
  6. Step 6: Final answer
    x = 111,493.90

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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.