Home / 129,453.56-178,701.19-87,036.69

Finding the Fourth Proportional to 129,453.56, 178,701.19 and 87,036.69

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Solution

The fourth proportional to 129,453.56, 178,701.19 and 87,036.69 is: 120,147.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,453.56 : 178,701.19 = 87,036.69 : x
  2. Step 2: Convert to fraction form
    129,453.56/178,701.19 = 87,036.69/x
  3. Step 3: Cross multiply
    129,453.56x = 178,701.19 × 87,036.69
  4. Step 4: Simplify right side
    129,453.56x = 15,553,560,076.66
  5. Step 5: Solve for x
    x = 15,553,560,076.66/129,453.56
  6. Step 6: Final answer
    x = 120,147.80

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1.5x scale

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.