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Finding the Fourth Proportional to 168,815.68, 253,251.68 and 75,317.92

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Solution

The fourth proportional to 168,815.68, 253,251.68 and 75,317.92 is: 112,989.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    168,815.68 : 253,251.68 = 75,317.92 : x
  2. Step 2: Convert to fraction form
    168,815.68/253,251.68 = 75,317.92/x
  3. Step 3: Cross multiply
    168,815.68x = 253,251.68 × 75,317.92
  4. Step 4: Simplify right side
    168,815.68x = 19,074,389,774.11
  5. Step 5: Solve for x
    x = 19,074,389,774.11/168,815.68
  6. Step 6: Final answer
    x = 112,989.44

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.