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Finding the Fourth Proportional to 101,991.56, 140,747.10 and 57,279.56

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Solution

The fourth proportional to 101,991.56, 140,747.10 and 57,279.56 is: 79,045.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,991.56 : 140,747.10 = 57,279.56 : x
  2. Step 2: Convert to fraction form
    101,991.56/140,747.10 = 57,279.56/x
  3. Step 3: Cross multiply
    101,991.56x = 140,747.10 × 57,279.56
  4. Step 4: Simplify right side
    101,991.56x = 8,061,931,959.28
  5. Step 5: Solve for x
    x = 8,061,931,959.28/101,991.56
  6. Step 6: Final answer
    x = 79,045.09

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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.