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Finding the Fourth Proportional to 218,435.68, 327,672.45 and 66,666.90

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Solution

The fourth proportional to 218,435.68, 327,672.45 and 66,666.90 is: 100,006.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,435.68 : 327,672.45 = 66,666.90 : x
  2. Step 2: Convert to fraction form
    218,435.68/327,672.45 = 66,666.90/x
  3. Step 3: Cross multiply
    218,435.68x = 327,672.45 × 66,666.90
  4. Step 4: Simplify right side
    218,435.68x = 21,844,906,456.91
  5. Step 5: Solve for x
    x = 21,844,906,456.91/218,435.68
  6. Step 6: Final answer
    x = 100,006.13

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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.