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Finding the Fourth Proportional to 121,213.76, 167,274.52 and 67,499.40

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Solution

The fourth proportional to 121,213.76, 167,274.52 and 67,499.40 is: 93,148.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,213.76 : 167,274.52 = 67,499.40 : x
  2. Step 2: Convert to fraction form
    121,213.76/167,274.52 = 67,499.40/x
  3. Step 3: Cross multiply
    121,213.76x = 167,274.52 × 67,499.40
  4. Step 4: Simplify right side
    121,213.76x = 11,290,929,735.29
  5. Step 5: Solve for x
    x = 11,290,929,735.29/121,213.76
  6. Step 6: Final answer
    x = 93,148.91

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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.