Home / 101,986.72-140,756.88-80,427.04

Finding the Fourth Proportional to 101,986.72, 140,756.88 and 80,427.04

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Solution

The fourth proportional to 101,986.72, 140,756.88 and 80,427.04 is: 111,001.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,986.72 : 140,756.88 = 80,427.04 : x
  2. Step 2: Convert to fraction form
    101,986.72/140,756.88 = 80,427.04/x
  3. Step 3: Cross multiply
    101,986.72x = 140,756.88 × 80,427.04
  4. Step 4: Simplify right side
    101,986.72x = 11,320,659,218.04
  5. Step 5: Solve for x
    x = 11,320,659,218.04/101,986.72
  6. Step 6: Final answer
    x = 111,001.31

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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.