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Finding the Fourth Proportional to 101,469.20, 140,011.14 and 63,716.72

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Solution

The fourth proportional to 101,469.20, 140,011.14 and 63,716.72 is: 87,918.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,469.20 : 140,011.14 = 63,716.72 : x
  2. Step 2: Convert to fraction form
    101,469.20/140,011.14 = 63,716.72/x
  3. Step 3: Cross multiply
    101,469.20x = 140,011.14 × 63,716.72
  4. Step 4: Simplify right side
    101,469.20x = 8,921,050,604.26
  5. Step 5: Solve for x
    x = 8,921,050,604.26/101,469.20
  6. Step 6: Final answer
    x = 87,918.80

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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.