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Finding the Fourth Proportional to 129,791.92, 179,110.38 and 73,203.28

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Solution

The fourth proportional to 129,791.92, 179,110.38 and 73,203.28 is: 101,019.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,791.92 : 179,110.38 = 73,203.28 : x
  2. Step 2: Convert to fraction form
    129,791.92/179,110.38 = 73,203.28/x
  3. Step 3: Cross multiply
    129,791.92x = 179,110.38 × 73,203.28
  4. Step 4: Simplify right side
    129,791.92x = 13,111,467,298.05
  5. Step 5: Solve for x
    x = 13,111,467,298.05/129,791.92
  6. Step 6: Final answer
    x = 101,019.13

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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.