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Finding the Fourth Proportional to 220,907.70, 331,361.55 and 80,648.10

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Solution

The fourth proportional to 220,907.70, 331,361.55 and 80,648.10 is: 120,972.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,907.70 : 331,361.55 = 80,648.10 : x
  2. Step 2: Convert to fraction form
    220,907.70/331,361.55 = 80,648.10/x
  3. Step 3: Cross multiply
    220,907.70x = 331,361.55 × 80,648.10
  4. Step 4: Simplify right side
    220,907.70x = 26,723,679,420.56
  5. Step 5: Solve for x
    x = 26,723,679,420.56/220,907.70
  6. Step 6: Final answer
    x = 120,972.15

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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.