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Finding the Fourth Proportional to 132,570.80, 198,721.80 and 65,908.40

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Solution

The fourth proportional to 132,570.80, 198,721.80 and 65,908.40 is: 98,795.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    132,570.80 : 198,721.80 = 65,908.40 : x
  2. Step 2: Convert to fraction form
    132,570.80/198,721.80 = 65,908.40/x
  3. Step 3: Cross multiply
    132,570.80x = 198,721.80 × 65,908.40
  4. Step 4: Simplify right side
    132,570.80x = 13,097,435,883.12
  5. Step 5: Solve for x
    x = 13,097,435,883.12/132,570.80
  6. Step 6: Final answer
    x = 98,795.78

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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.