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Finding the Fourth Proportional to 121,435.76, 167,627.48 and 91,308.56

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Solution

The fourth proportional to 121,435.76, 167,627.48 and 91,308.56 is: 126,040.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,435.76 : 167,627.48 = 91,308.56 : x
  2. Step 2: Convert to fraction form
    121,435.76/167,627.48 = 91,308.56/x
  3. Step 3: Cross multiply
    121,435.76x = 167,627.48 × 91,308.56
  4. Step 4: Simplify right side
    121,435.76x = 15,305,822,520.55
  5. Step 5: Solve for x
    x = 15,305,822,520.55/121,435.76
  6. Step 6: Final answer
    x = 126,040.49

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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.