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Finding the Fourth Proportional to 108,685.88, 162,787.96 and 83,540.80

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Solution

The fourth proportional to 108,685.88, 162,787.96 and 83,540.80 is: 125,126.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,685.88 : 162,787.96 = 83,540.80 : x
  2. Step 2: Convert to fraction form
    108,685.88/162,787.96 = 83,540.80/x
  3. Step 3: Cross multiply
    108,685.88x = 162,787.96 × 83,540.80
  4. Step 4: Simplify right side
    108,685.88x = 13,599,436,408.77
  5. Step 5: Solve for x
    x = 13,599,436,408.77/108,685.88
  6. Step 6: Final answer
    x = 125,126.06

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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.