Home / 83,310.72-124,964.40-20,979.52

Finding the Fourth Proportional to 83,310.72, 124,964.40 and 20,979.52

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Solution

The fourth proportional to 83,310.72, 124,964.40 and 20,979.52 is: 31,468.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,310.72 : 124,964.40 = 20,979.52 : x
  2. Step 2: Convert to fraction form
    83,310.72/124,964.40 = 20,979.52/x
  3. Step 3: Cross multiply
    83,310.72x = 124,964.40 × 20,979.52
  4. Step 4: Simplify right side
    83,310.72x = 2,621,693,129.09
  5. Step 5: Solve for x
    x = 2,621,693,129.09/83,310.72
  6. Step 6: Final answer
    x = 31,468.86

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.