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Finding the Fourth Proportional to 121,388.76, 167,321.70 and 73,551.78

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Solution

The fourth proportional to 121,388.76, 167,321.70 and 73,551.78 is: 101,383.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,388.76 : 167,321.70 = 73,551.78 : x
  2. Step 2: Convert to fraction form
    121,388.76/167,321.70 = 73,551.78/x
  3. Step 3: Cross multiply
    121,388.76x = 167,321.70 × 73,551.78
  4. Step 4: Simplify right side
    121,388.76x = 12,306,808,867.63
  5. Step 5: Solve for x
    x = 12,306,808,867.63/121,388.76
  6. Step 6: Final answer
    x = 101,383.43

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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.