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Finding the Fourth Proportional to 121,379.78, 167,504.13 and 67,663.64

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Solution

The fourth proportional to 121,379.78, 167,504.13 and 67,663.64 is: 93,375.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,379.78 : 167,504.13 = 67,663.64 : x
  2. Step 2: Convert to fraction form
    121,379.78/167,504.13 = 67,663.64/x
  3. Step 3: Cross multiply
    121,379.78x = 167,504.13 × 67,663.64
  4. Step 4: Simplify right side
    121,379.78x = 11,333,939,569.59
  5. Step 5: Solve for x
    x = 11,333,939,569.59/121,379.78
  6. Step 6: Final answer
    x = 93,375.84

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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.