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Finding the Fourth Proportional to 101,687.18, 140,249.18 and 61,358.90

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Solution

The fourth proportional to 101,687.18, 140,249.18 and 61,358.90 is: 84,627.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,687.18 : 140,249.18 = 61,358.90 : x
  2. Step 2: Convert to fraction form
    101,687.18/140,249.18 = 61,358.90/x
  3. Step 3: Cross multiply
    101,687.18x = 140,249.18 × 61,358.90
  4. Step 4: Simplify right side
    101,687.18x = 8,605,534,402.66
  5. Step 5: Solve for x
    x = 8,605,534,402.66/101,687.18
  6. Step 6: Final answer
    x = 84,627.53

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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.