Home / 83,531.40-125,588.70-81,781.80

Finding the Fourth Proportional to 83,531.40, 125,588.70 and 81,781.80

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Solution

The fourth proportional to 83,531.40, 125,588.70 and 81,781.80 is: 122,958.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,531.40 : 125,588.70 = 81,781.80 : x
  2. Step 2: Convert to fraction form
    83,531.40/125,588.70 = 81,781.80/x
  3. Step 3: Cross multiply
    83,531.40x = 125,588.70 × 81,781.80
  4. Step 4: Simplify right side
    83,531.40x = 10,270,869,945.66
  5. Step 5: Solve for x
    x = 10,270,869,945.66/83,531.40
  6. Step 6: Final answer
    x = 122,958.19

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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.