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Finding the Fourth Proportional to 65,568.72, 90,499.14 and 41,690.73

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Solution

The fourth proportional to 65,568.72, 90,499.14 and 41,690.73 is: 57,542.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,568.72 : 90,499.14 = 41,690.73 : x
  2. Step 2: Convert to fraction form
    65,568.72/90,499.14 = 41,690.73/x
  3. Step 3: Cross multiply
    65,568.72x = 90,499.14 × 41,690.73
  4. Step 4: Simplify right side
    65,568.72x = 3,772,975,210.97
  5. Step 5: Solve for x
    x = 3,772,975,210.97/65,568.72
  6. Step 6: Final answer
    x = 57,542.30

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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.