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Finding the Fourth Proportional to 132,568.80, 198,718.80 and 65,906.40

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Solution

The fourth proportional to 132,568.80, 198,718.80 and 65,906.40 is: 98,792.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    132,568.80 : 198,718.80 = 65,906.40 : x
  2. Step 2: Convert to fraction form
    132,568.80/198,718.80 = 65,906.40/x
  3. Step 3: Cross multiply
    132,568.80x = 198,718.80 × 65,906.40
  4. Step 4: Simplify right side
    132,568.80x = 13,096,840,720.32
  5. Step 5: Solve for x
    x = 13,096,840,720.32/132,568.80
  6. Step 6: Final answer
    x = 98,792.78

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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.