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Finding the Fourth Proportional to 129,580.80, 178,760.37 and 75,832.56

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Solution

The fourth proportional to 129,580.80, 178,760.37 and 75,832.56 is: 104,613.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,580.80 : 178,760.37 = 75,832.56 : x
  2. Step 2: Convert to fraction form
    129,580.80/178,760.37 = 75,832.56/x
  3. Step 3: Cross multiply
    129,580.80x = 178,760.37 × 75,832.56
  4. Step 4: Simplify right side
    129,580.80x = 13,555,856,483.65
  5. Step 5: Solve for x
    x = 13,555,856,483.65/129,580.80
  6. Step 6: Final answer
    x = 104,613.16

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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.