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Finding the Fourth Proportional to 121,234.50, 167,308.79 and 67,519.50

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Solution

The fourth proportional to 121,234.50, 167,308.79 and 67,519.50 is: 93,179.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,234.50 : 167,308.79 = 67,519.50 : x
  2. Step 2: Convert to fraction form
    121,234.50/167,308.79 = 67,519.50/x
  3. Step 3: Cross multiply
    121,234.50x = 167,308.79 × 67,519.50
  4. Step 4: Simplify right side
    121,234.50x = 11,296,605,508.81
  5. Step 5: Solve for x
    x = 11,296,605,508.81/121,234.50
  6. Step 6: Final answer
    x = 93,179.80

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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.