Home / 129,255.77-178,351.16-71,887.56

Finding the Fourth Proportional to 129,255.77, 178,351.16 and 71,887.56

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Solution

The fourth proportional to 129,255.77, 178,351.16 and 71,887.56 is: 99,192.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,255.77 : 178,351.16 = 71,887.56 : x
  2. Step 2: Convert to fraction form
    129,255.77/178,351.16 = 71,887.56/x
  3. Step 3: Cross multiply
    129,255.77x = 178,351.16 × 71,887.56
  4. Step 4: Simplify right side
    129,255.77x = 12,821,229,356.13
  5. Step 5: Solve for x
    x = 12,821,229,356.13/129,255.77
  6. Step 6: Final answer
    x = 99,192.71

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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.