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Finding the Fourth Proportional to 156,481.44, 215,938.56 and 92,781.12

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Solution

The fourth proportional to 156,481.44, 215,938.56 and 92,781.12 is: 128,034.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,481.44 : 215,938.56 = 92,781.12 : x
  2. Step 2: Convert to fraction form
    156,481.44/215,938.56 = 92,781.12/x
  3. Step 3: Cross multiply
    156,481.44x = 215,938.56 × 92,781.12
  4. Step 4: Simplify right side
    156,481.44x = 20,035,021,447.99
  5. Step 5: Solve for x
    x = 20,035,021,447.99/156,481.44
  6. Step 6: Final answer
    x = 128,034.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.