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Finding the Fourth Proportional to 90,453.60, 135,568.80 and 65,579.04

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Solution

The fourth proportional to 90,453.60, 135,568.80 and 65,579.04 is: 98,287.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,453.60 : 135,568.80 = 65,579.04 : x
  2. Step 2: Convert to fraction form
    90,453.60/135,568.80 = 65,579.04/x
  3. Step 3: Cross multiply
    90,453.60x = 135,568.80 × 65,579.04
  4. Step 4: Simplify right side
    90,453.60x = 8,890,471,757.95
  5. Step 5: Solve for x
    x = 8,890,471,757.95/90,453.60
  6. Step 6: Final answer
    x = 98,287.65

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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.