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Finding the Fourth Proportional to 121,480.58, 167,600.12 and 81,219.80

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Solution

The fourth proportional to 121,480.58, 167,600.12 and 81,219.80 is: 112,054.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,480.58 : 167,600.12 = 81,219.80 : x
  2. Step 2: Convert to fraction form
    121,480.58/167,600.12 = 81,219.80/x
  3. Step 3: Cross multiply
    121,480.58x = 167,600.12 × 81,219.80
  4. Step 4: Simplify right side
    121,480.58x = 13,612,446,982.28
  5. Step 5: Solve for x
    x = 13,612,446,982.28/121,480.58
  6. Step 6: Final answer
    x = 112,054.52

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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.