Home / 129,451.56-178,698.43-87,034.69

Finding the Fourth Proportional to 129,451.56, 178,698.43 and 87,034.69

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Solution

The fourth proportional to 129,451.56, 178,698.43 and 87,034.69 is: 120,145.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,451.56 : 178,698.43 = 87,034.69 : x
  2. Step 2: Convert to fraction form
    129,451.56/178,698.43 = 87,034.69/x
  3. Step 3: Cross multiply
    129,451.56x = 178,698.43 × 87,034.69
  4. Step 4: Simplify right side
    129,451.56x = 15,552,962,458.54
  5. Step 5: Solve for x
    x = 15,552,962,458.54/129,451.56
  6. Step 6: Final answer
    x = 120,145.04

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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.