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Finding the Fourth Proportional to 108,812.78, 162,902.19 and 80,856.80

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Solution

The fourth proportional to 108,812.78, 162,902.19 and 80,856.80 is: 121,049.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,812.78 : 162,902.19 = 80,856.80 : x
  2. Step 2: Convert to fraction form
    108,812.78/162,902.19 = 80,856.80/x
  3. Step 3: Cross multiply
    108,812.78x = 162,902.19 × 80,856.80
  4. Step 4: Simplify right side
    108,812.78x = 13,171,749,796.39
  5. Step 5: Solve for x
    x = 13,171,749,796.39/108,812.78
  6. Step 6: Final answer
    x = 121,049.66

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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.