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Finding the Fourth Proportional to 141,449.78, 195,145.45 and 80,988.11

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Solution

The fourth proportional to 141,449.78, 195,145.45 and 80,988.11 is: 111,731.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,449.78 : 195,145.45 = 80,988.11 : x
  2. Step 2: Convert to fraction form
    141,449.78/195,145.45 = 80,988.11/x
  3. Step 3: Cross multiply
    141,449.78x = 195,145.45 × 80,988.11
  4. Step 4: Simplify right side
    141,449.78x = 15,804,461,170.60
  5. Step 5: Solve for x
    x = 15,804,461,170.60/141,449.78
  6. Step 6: Final answer
    x = 111,731.96

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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.