Home / 212,134.12-318,289.30-85,863.62

Finding the Fourth Proportional to 212,134.12, 318,289.30 and 85,863.62

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Solution

The fourth proportional to 212,134.12, 318,289.30 and 85,863.62 is: 128,831.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,134.12 : 318,289.30 = 85,863.62 : x
  2. Step 2: Convert to fraction form
    212,134.12/318,289.30 = 85,863.62/x
  3. Step 3: Cross multiply
    212,134.12x = 318,289.30 × 85,863.62
  4. Step 4: Simplify right side
    212,134.12x = 27,329,472,086.33
  5. Step 5: Solve for x
    x = 27,329,472,086.33/212,134.12
  6. Step 6: Final answer
    x = 128,831.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.