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Finding the Fourth Proportional to 101,354.68, 139,835.22 and 65,589.88

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Solution

The fourth proportional to 101,354.68, 139,835.22 and 65,589.88 is: 90,491.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,354.68 : 139,835.22 = 65,589.88 : x
  2. Step 2: Convert to fraction form
    101,354.68/139,835.22 = 65,589.88/x
  3. Step 3: Cross multiply
    101,354.68x = 139,835.22 × 65,589.88
  4. Step 4: Simplify right side
    101,354.68x = 9,171,775,299.57
  5. Step 5: Solve for x
    x = 9,171,775,299.57/101,354.68
  6. Step 6: Final answer
    x = 90,491.88

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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.