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Finding the Fourth Proportional to 215,781.84, 323,672.76 and 66,022.56

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Solution

The fourth proportional to 215,781.84, 323,672.76 and 66,022.56 is: 99,033.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,781.84 : 323,672.76 = 66,022.56 : x
  2. Step 2: Convert to fraction form
    215,781.84/323,672.76 = 66,022.56/x
  3. Step 3: Cross multiply
    215,781.84x = 323,672.76 × 66,022.56
  4. Step 4: Simplify right side
    215,781.84x = 21,369,704,217.47
  5. Step 5: Solve for x
    x = 21,369,704,217.47/215,781.84
  6. Step 6: Final answer
    x = 99,033.84

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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.