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Finding the Fourth Proportional to 103,956.14, 143,481.71 and 65,691.34

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Solution

The fourth proportional to 103,956.14, 143,481.71 and 65,691.34 is: 90,668.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,956.14 : 143,481.71 = 65,691.34 : x
  2. Step 2: Convert to fraction form
    103,956.14/143,481.71 = 65,691.34/x
  3. Step 3: Cross multiply
    103,956.14x = 143,481.71 × 65,691.34
  4. Step 4: Simplify right side
    103,956.14x = 9,425,505,600.92
  5. Step 5: Solve for x
    x = 9,425,505,600.92/103,956.14
  6. Step 6: Final answer
    x = 90,668.10

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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.