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Finding the Fourth Proportional to 141,781.71, 195,663.20 and 81,363.41

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Solution

The fourth proportional to 141,781.71, 195,663.20 and 81,363.41 is: 112,284.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,781.71 : 195,663.20 = 81,363.41 : x
  2. Step 2: Convert to fraction form
    141,781.71/195,663.20 = 81,363.41/x
  3. Step 3: Cross multiply
    141,781.71x = 195,663.20 × 81,363.41
  4. Step 4: Simplify right side
    141,781.71x = 15,919,824,267.54
  5. Step 5: Solve for x
    x = 15,919,824,267.54/141,781.71
  6. Step 6: Final answer
    x = 112,284.05

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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.