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Finding the Fourth Proportional to 101,615.26, 140,137.68 and 65,767.90

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Solution

The fourth proportional to 101,615.26, 140,137.68 and 65,767.90 is: 90,700.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,615.26 : 140,137.68 = 65,767.90 : x
  2. Step 2: Convert to fraction form
    101,615.26/140,137.68 = 65,767.90/x
  3. Step 3: Cross multiply
    101,615.26x = 140,137.68 × 65,767.90
  4. Step 4: Simplify right side
    101,615.26x = 9,216,560,924.47
  5. Step 5: Solve for x
    x = 9,216,560,924.47/101,615.26
  6. Step 6: Final answer
    x = 90,700.56

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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.