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Finding the Fourth Proportional to 101,987.57, 140,629.34 and 69,727.42

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Solution

The fourth proportional to 101,987.57, 140,629.34 and 69,727.42 is: 96,146.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,987.57 : 140,629.34 = 69,727.42 : x
  2. Step 2: Convert to fraction form
    101,987.57/140,629.34 = 69,727.42/x
  3. Step 3: Cross multiply
    101,987.57x = 140,629.34 × 69,727.42
  4. Step 4: Simplify right side
    101,987.57x = 9,805,720,965.88
  5. Step 5: Solve for x
    x = 9,805,720,965.88/101,987.57
  6. Step 6: Final answer
    x = 96,146.24

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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.