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Finding the Fourth Proportional to 65,851.74, 98,799.78 and 20,880.43

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Solution

The fourth proportional to 65,851.74, 98,799.78 and 20,880.43 is: 31,327.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,851.74 : 98,799.78 = 20,880.43 : x
  2. Step 2: Convert to fraction form
    65,851.74/98,799.78 = 20,880.43/x
  3. Step 3: Cross multiply
    65,851.74x = 98,799.78 × 20,880.43
  4. Step 4: Simplify right side
    65,851.74x = 2,062,981,785.90
  5. Step 5: Solve for x
    x = 2,062,981,785.90/65,851.74
  6. Step 6: Final answer
    x = 31,327.68

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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.