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Finding the Fourth Proportional to 121,322.30, 167,335.65 and 80,412.44

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Solution

The fourth proportional to 121,322.30, 167,335.65 and 80,412.44 is: 110,910.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,322.30 : 167,335.65 = 80,412.44 : x
  2. Step 2: Convert to fraction form
    121,322.30/167,335.65 = 80,412.44/x
  3. Step 3: Cross multiply
    121,322.30x = 167,335.65 × 80,412.44
  4. Step 4: Simplify right side
    121,322.30x = 13,455,867,078.81
  5. Step 5: Solve for x
    x = 13,455,867,078.81/121,322.30
  6. Step 6: Final answer
    x = 110,910.09

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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.