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Finding the Fourth Proportional to 168,630.12, 252,894.42 and 138,974.40

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Solution

The fourth proportional to 168,630.12, 252,894.42 and 138,974.40 is: 208,419.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    168,630.12 : 252,894.42 = 138,974.40 : x
  2. Step 2: Convert to fraction form
    168,630.12/252,894.42 = 138,974.40/x
  3. Step 3: Cross multiply
    168,630.12x = 252,894.42 × 138,974.40
  4. Step 4: Simplify right side
    168,630.12x = 35,145,850,282.85
  5. Step 5: Solve for x
    x = 35,145,850,282.85/168,630.12
  6. Step 6: Final answer
    x = 208,419.77

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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.