Home / 71,139.31-106,708.97-18,548.65

Finding the Fourth Proportional to 71,139.31, 106,708.97 and 18,548.65

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Solution

The fourth proportional to 71,139.31, 106,708.97 and 18,548.65 is: 27,822.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,139.31 : 106,708.97 = 18,548.65 : x
  2. Step 2: Convert to fraction form
    71,139.31/106,708.97 = 18,548.65/x
  3. Step 3: Cross multiply
    71,139.31x = 106,708.97 × 18,548.65
  4. Step 4: Simplify right side
    71,139.31x = 1,979,306,710.10
  5. Step 5: Solve for x
    x = 1,979,306,710.10/71,139.31
  6. Step 6: Final answer
    x = 27,822.97

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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.