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Finding the Fourth Proportional to 121,642.43, 167,945.54 and 108,873.50

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Solution

The fourth proportional to 121,642.43, 167,945.54 and 108,873.50 is: 150,316.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,642.43 : 167,945.54 = 108,873.50 : x
  2. Step 2: Convert to fraction form
    121,642.43/167,945.54 = 108,873.50/x
  3. Step 3: Cross multiply
    121,642.43x = 167,945.54 × 108,873.50
  4. Step 4: Simplify right side
    121,642.43x = 18,284,817,365.09
  5. Step 5: Solve for x
    x = 18,284,817,365.09/121,642.43
  6. Step 6: Final answer
    x = 150,316.12

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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.