Home / 81,146.33-112,013.19-72,633.43

Finding the Fourth Proportional to 81,146.33, 112,013.19 and 72,633.43

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Solution

The fourth proportional to 81,146.33, 112,013.19 and 72,633.43 is: 100,262.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,146.33 : 112,013.19 = 72,633.43 : x
  2. Step 2: Convert to fraction form
    81,146.33/112,013.19 = 72,633.43/x
  3. Step 3: Cross multiply
    81,146.33x = 112,013.19 × 72,633.43
  4. Step 4: Simplify right side
    81,146.33x = 8,135,901,938.09
  5. Step 5: Solve for x
    x = 8,135,901,938.09/81,146.33
  6. Step 6: Final answer
    x = 100,262.11

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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.