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Finding the Fourth Proportional to 121,310.46, 167,407.56 and 66,863.88

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Solution

The fourth proportional to 121,310.46, 167,407.56 and 66,863.88 is: 92,271.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,310.46 : 167,407.56 = 66,863.88 : x
  2. Step 2: Convert to fraction form
    121,310.46/167,407.56 = 66,863.88/x
  3. Step 3: Cross multiply
    121,310.46x = 167,407.56 × 66,863.88
  4. Step 4: Simplify right side
    121,310.46x = 11,193,519,002.93
  5. Step 5: Solve for x
    x = 11,193,519,002.93/121,310.46
  6. Step 6: Final answer
    x = 92,271.67

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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.