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Finding the Fourth Proportional to 121,379.66, 167,513.91 and 66,942.48

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Solution

The fourth proportional to 121,379.66, 167,513.91 and 66,942.48 is: 92,386.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,379.66 : 167,513.91 = 66,942.48 : x
  2. Step 2: Convert to fraction form
    121,379.66/167,513.91 = 66,942.48/x
  3. Step 3: Cross multiply
    121,379.66x = 167,513.91 × 66,942.48
  4. Step 4: Simplify right side
    121,379.66x = 11,213,796,109.47
  5. Step 5: Solve for x
    x = 11,213,796,109.47/121,379.66
  6. Step 6: Final answer
    x = 92,386.12

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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.