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Finding the Fourth Proportional to 140,348.67, 193,680.96 and 79,919.31

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Solution

The fourth proportional to 140,348.67, 193,680.96 and 79,919.31 is: 110,288.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,348.67 : 193,680.96 = 79,919.31 : x
  2. Step 2: Convert to fraction form
    140,348.67/193,680.96 = 79,919.31/x
  3. Step 3: Cross multiply
    140,348.67x = 193,680.96 × 79,919.31
  4. Step 4: Simplify right side
    140,348.67x = 15,478,848,304.11
  5. Step 5: Solve for x
    x = 15,478,848,304.11/140,348.67
  6. Step 6: Final answer
    x = 110,288.53

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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.