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Finding the Fourth Proportional to 218,612.60, 327,938.06 and 66,843.92

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Solution

The fourth proportional to 218,612.60, 327,938.06 and 66,843.92 is: 100,271.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,612.60 : 327,938.06 = 66,843.92 : x
  2. Step 2: Convert to fraction form
    218,612.60/327,938.06 = 66,843.92/x
  3. Step 3: Cross multiply
    218,612.60x = 327,938.06 × 66,843.92
  4. Step 4: Simplify right side
    218,612.60x = 21,920,665,447.60
  5. Step 5: Solve for x
    x = 21,920,665,447.60/218,612.60
  6. Step 6: Final answer
    x = 100,271.74

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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.