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Finding the Fourth Proportional to 121,550, 167,745.56 and 71,265.20

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Solution

The fourth proportional to 121,550, 167,745.56 and 71,265.20 is: 98,349.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,550 : 167,745.56 = 71,265.20 : x
  2. Step 2: Convert to fraction form
    121,550/167,745.56 = 71,265.20/x
  3. Step 3: Cross multiply
    121,550x = 167,745.56 × 71,265.20
  4. Step 4: Simplify right side
    121,550x = 11,954,420,882.51
  5. Step 5: Solve for x
    x = 11,954,420,882.51/121,550
  6. Step 6: Final answer
    x = 98,349.82

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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.