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Finding the Fourth Proportional to 220,320.12, 330,671.70 and 120,571.32

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Solution

The fourth proportional to 220,320.12, 330,671.70 and 120,571.32 is: 180,961.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,320.12 : 330,671.70 = 120,571.32 : x
  2. Step 2: Convert to fraction form
    220,320.12/330,671.70 = 120,571.32/x
  3. Step 3: Cross multiply
    220,320.12x = 330,671.70 × 120,571.32
  4. Step 4: Simplify right side
    220,320.12x = 39,869,523,355.64
  5. Step 5: Solve for x
    x = 39,869,523,355.64/220,320.12
  6. Step 6: Final answer
    x = 180,961.79

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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.