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Finding the Fourth Proportional to 66,250.59, 91,405.35 and 40,414.59

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Solution

The fourth proportional to 66,250.59, 91,405.35 and 40,414.59 is: 55,759.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,250.59 : 91,405.35 = 40,414.59 : x
  2. Step 2: Convert to fraction form
    66,250.59/91,405.35 = 40,414.59/x
  3. Step 3: Cross multiply
    66,250.59x = 91,405.35 × 40,414.59
  4. Step 4: Simplify right side
    66,250.59x = 3,694,109,744.06
  5. Step 5: Solve for x
    x = 3,694,109,744.06/66,250.59
  6. Step 6: Final answer
    x = 55,759.65

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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.