Home / 129,588.06-178,770.38-75,839.78

Finding the Fourth Proportional to 129,588.06, 178,770.38 and 75,839.78

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Solution

The fourth proportional to 129,588.06, 178,770.38 and 75,839.78 is: 104,623.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,588.06 : 178,770.38 = 75,839.78 : x
  2. Step 2: Convert to fraction form
    129,588.06/178,770.38 = 75,839.78/x
  3. Step 3: Cross multiply
    129,588.06x = 178,770.38 × 75,839.78
  4. Step 4: Simplify right side
    129,588.06x = 13,557,906,289.72
  5. Step 5: Solve for x
    x = 13,557,906,289.72/129,588.06
  6. Step 6: Final answer
    x = 104,623.11

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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.