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Finding the Fourth Proportional to 65,591.17, 90,522.78 and 40,112.44

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Solution

The fourth proportional to 65,591.17, 90,522.78 and 40,112.44 is: 55,359.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,591.17 : 90,522.78 = 40,112.44 : x
  2. Step 2: Convert to fraction form
    65,591.17/90,522.78 = 40,112.44/x
  3. Step 3: Cross multiply
    65,591.17x = 90,522.78 × 40,112.44
  4. Step 4: Simplify right side
    65,591.17x = 3,631,089,581.38
  5. Step 5: Solve for x
    x = 3,631,089,581.38/65,591.17
  6. Step 6: Final answer
    x = 55,359.43

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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.