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Finding the Fourth Proportional to 121,543.74, 167,738.76 and 67,839.21

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Solution

The fourth proportional to 121,543.74, 167,738.76 and 67,839.21 is: 93,622.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,543.74 : 167,738.76 = 67,839.21 : x
  2. Step 2: Convert to fraction form
    121,543.74/167,738.76 = 67,839.21/x
  3. Step 3: Cross multiply
    121,543.74x = 167,738.76 × 67,839.21
  4. Step 4: Simplify right side
    121,543.74x = 11,379,264,964.78
  5. Step 5: Solve for x
    x = 11,379,264,964.78/121,543.74
  6. Step 6: Final answer
    x = 93,622.80

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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.