Home / 81,011.72-121,517.22-21,853.38

Finding the Fourth Proportional to 81,011.72, 121,517.22 and 21,853.38

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Solution

The fourth proportional to 81,011.72, 121,517.22 and 21,853.38 is: 32,779.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,011.72 : 121,517.22 = 21,853.38 : x
  2. Step 2: Convert to fraction form
    81,011.72/121,517.22 = 21,853.38/x
  3. Step 3: Cross multiply
    81,011.72x = 121,517.22 × 21,853.38
  4. Step 4: Simplify right side
    81,011.72x = 2,655,561,985.20
  5. Step 5: Solve for x
    x = 2,655,561,985.20/81,011.72
  6. Step 6: Final answer
    x = 32,779.97

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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.