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Finding the Fourth Proportional to 101,209.64, 139,658.70 and 58,759.88

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Solution

The fourth proportional to 101,209.64, 139,658.70 and 58,759.88 is: 81,082.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,209.64 : 139,658.70 = 58,759.88 : x
  2. Step 2: Convert to fraction form
    101,209.64/139,658.70 = 58,759.88/x
  3. Step 3: Cross multiply
    101,209.64x = 139,658.70 × 58,759.88
  4. Step 4: Simplify right side
    101,209.64x = 8,206,328,452.96
  5. Step 5: Solve for x
    x = 8,206,328,452.96/101,209.64
  6. Step 6: Final answer
    x = 81,082.48

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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.