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Finding the Fourth Proportional to 108,138.39, 161,990.10 and 53,939.67

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Solution

The fourth proportional to 108,138.39, 161,990.10 and 53,939.67 is: 80,801.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,138.39 : 161,990.10 = 53,939.67 : x
  2. Step 2: Convert to fraction form
    108,138.39/161,990.10 = 53,939.67/x
  3. Step 3: Cross multiply
    108,138.39x = 161,990.10 × 53,939.67
  4. Step 4: Simplify right side
    108,138.39x = 8,737,692,537.27
  5. Step 5: Solve for x
    x = 8,737,692,537.27/108,138.39
  6. Step 6: Final answer
    x = 80,801.02

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1.5x scale

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.