Home / 129,067.90-178,115.97-71,712.48

Finding the Fourth Proportional to 129,067.90, 178,115.97 and 71,712.48

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Solution

The fourth proportional to 129,067.90, 178,115.97 and 71,712.48 is: 98,964.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,067.90 : 178,115.97 = 71,712.48 : x
  2. Step 2: Convert to fraction form
    129,067.90/178,115.97 = 71,712.48/x
  3. Step 3: Cross multiply
    129,067.90x = 178,115.97 × 71,712.48
  4. Step 4: Simplify right side
    129,067.90x = 12,773,137,936.31
  5. Step 5: Solve for x
    x = 12,773,137,936.31/129,067.90
  6. Step 6: Final answer
    x = 98,964.48

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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.