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Finding the Fourth Proportional to 217,620.72, 326,356.92 and 75,432.78

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Solution

The fourth proportional to 217,620.72, 326,356.92 and 75,432.78 is: 113,123.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,620.72 : 326,356.92 = 75,432.78 : x
  2. Step 2: Convert to fraction form
    217,620.72/326,356.92 = 75,432.78/x
  3. Step 3: Cross multiply
    217,620.72x = 326,356.92 × 75,432.78
  4. Step 4: Simplify right side
    217,620.72x = 24,618,009,747.84
  5. Step 5: Solve for x
    x = 24,618,009,747.84/217,620.72
  6. Step 6: Final answer
    x = 113,123.46

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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.