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Finding the Fourth Proportional to 66,387.43, 91,613.49 and 36,173

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Solution

The fourth proportional to 66,387.43, 91,613.49 and 36,173 is: 49,918.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,387.43 : 91,613.49 = 36,173 : x
  2. Step 2: Convert to fraction form
    66,387.43/91,613.49 = 36,173/x
  3. Step 3: Cross multiply
    66,387.43x = 91,613.49 × 36,173
  4. Step 4: Simplify right side
    66,387.43x = 3,313,934,773.77
  5. Step 5: Solve for x
    x = 3,313,934,773.77/66,387.43
  6. Step 6: Final answer
    x = 49,918.11

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.