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Finding the Fourth Proportional to 108,757.08, 162,982.53 and 86,471.55

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Solution

The fourth proportional to 108,757.08, 162,982.53 and 86,471.55 is: 129,585.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,757.08 : 162,982.53 = 86,471.55 : x
  2. Step 2: Convert to fraction form
    108,757.08/162,982.53 = 86,471.55/x
  3. Step 3: Cross multiply
    108,757.08x = 162,982.53 × 86,471.55
  4. Step 4: Simplify right side
    108,757.08x = 14,093,351,992.02
  5. Step 5: Solve for x
    x = 14,093,351,992.02/108,757.08
  6. Step 6: Final answer
    x = 129,585.60

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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.