Home / 230,719.18-318,392.09-128,738.45

Finding the Fourth Proportional to 230,719.18, 318,392.09 and 128,738.45

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Solution

The fourth proportional to 230,719.18, 318,392.09 and 128,738.45 is: 177,658.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,719.18 : 318,392.09 = 128,738.45 : x
  2. Step 2: Convert to fraction form
    230,719.18/318,392.09 = 128,738.45/x
  3. Step 3: Cross multiply
    230,719.18x = 318,392.09 × 128,738.45
  4. Step 4: Simplify right side
    230,719.18x = 40,989,304,311.15
  5. Step 5: Solve for x
    x = 40,989,304,311.15/230,719.18
  6. Step 6: Final answer
    x = 177,658.85

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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.