Home / 230,660.64-318,330-128,719.44

Finding the Fourth Proportional to 230,660.64, 318,330 and 128,719.44

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Solution

The fourth proportional to 230,660.64, 318,330 and 128,719.44 is: 177,643.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,660.64 : 318,330 = 128,719.44 : x
  2. Step 2: Convert to fraction form
    230,660.64/318,330 = 128,719.44/x
  3. Step 3: Cross multiply
    230,660.64x = 318,330 × 128,719.44
  4. Step 4: Simplify right side
    230,660.64x = 40,975,259,335.20
  5. Step 5: Solve for x
    x = 40,975,259,335.20/230,660.64
  6. Step 6: Final answer
    x = 177,643.05

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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.