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Finding the Fourth Proportional to 200,084.31, 300,126.45 and 81,755.55

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Solution

The fourth proportional to 200,084.31, 300,126.45 and 81,755.55 is: 122,633.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    200,084.31 : 300,126.45 = 81,755.55 : x
  2. Step 2: Convert to fraction form
    200,084.31/300,126.45 = 81,755.55/x
  3. Step 3: Cross multiply
    200,084.31x = 300,126.45 × 81,755.55
  4. Step 4: Simplify right side
    200,084.31x = 24,537,002,989.30
  5. Step 5: Solve for x
    x = 24,537,002,989.30/200,084.31
  6. Step 6: Final answer
    x = 122,633.32

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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.