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Finding the Fourth Proportional to 141,508.76, 195,310 and 81,119.92

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Solution

The fourth proportional to 141,508.76, 195,310 and 81,119.92 is: 111,961.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,508.76 : 195,310 = 81,119.92 : x
  2. Step 2: Convert to fraction form
    141,508.76/195,310 = 81,119.92/x
  3. Step 3: Cross multiply
    141,508.76x = 195,310 × 81,119.92
  4. Step 4: Simplify right side
    141,508.76x = 15,843,531,575.20
  5. Step 5: Solve for x
    x = 15,843,531,575.20/141,508.76
  6. Step 6: Final answer
    x = 111,961.49

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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.