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Finding the Fourth Proportional to 217,781.55, 326,713.68 and 75,621.33

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Solution

The fourth proportional to 217,781.55, 326,713.68 and 75,621.33 is: 113,446.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,781.55 : 326,713.68 = 75,621.33 : x
  2. Step 2: Convert to fraction form
    217,781.55/326,713.68 = 75,621.33/x
  3. Step 3: Cross multiply
    217,781.55x = 326,713.68 × 75,621.33
  4. Step 4: Simplify right side
    217,781.55x = 24,706,523,010.79
  5. Step 5: Solve for x
    x = 24,706,523,010.79/217,781.55
  6. Step 6: Final answer
    x = 113,446.35

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1.5x scale

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.