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Finding the Fourth Proportional to 121,822.50, 168,160.86 and 91,695

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Solution

The fourth proportional to 121,822.50, 168,160.86 and 91,695 is: 126,573.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,822.50 : 168,160.86 = 91,695 : x
  2. Step 2: Convert to fraction form
    121,822.50/168,160.86 = 91,695/x
  3. Step 3: Cross multiply
    121,822.50x = 168,160.86 × 91,695
  4. Step 4: Simplify right side
    121,822.50x = 15,419,510,057.70
  5. Step 5: Solve for x
    x = 15,419,510,057.70/121,822.50
  6. Step 6: Final answer
    x = 126,573.58

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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.