Home / 212,721.20-318,984.24-72,422.72

Finding the Fourth Proportional to 212,721.20, 318,984.24 and 72,422.72

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Solution

The fourth proportional to 212,721.20, 318,984.24 and 72,422.72 is: 108,600.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,721.20 : 318,984.24 = 72,422.72 : x
  2. Step 2: Convert to fraction form
    212,721.20/318,984.24 = 72,422.72/x
  3. Step 3: Cross multiply
    212,721.20x = 318,984.24 × 72,422.72
  4. Step 4: Simplify right side
    212,721.20x = 23,101,706,297.93
  5. Step 5: Solve for x
    x = 23,101,706,297.93/212,721.20
  6. Step 6: Final answer
    x = 108,600.86

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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.