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Finding the Fourth Proportional to 220,912.20, 304,858.80 and 120,310.20

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Solution

The fourth proportional to 220,912.20, 304,858.80 and 120,310.20 is: 166,028.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,912.20 : 304,858.80 = 120,310.20 : x
  2. Step 2: Convert to fraction form
    220,912.20/304,858.80 = 120,310.20/x
  3. Step 3: Cross multiply
    220,912.20x = 304,858.80 × 120,310.20
  4. Step 4: Simplify right side
    220,912.20x = 36,677,623,199.76
  5. Step 5: Solve for x
    x = 36,677,623,199.76/220,912.20
  6. Step 6: Final answer
    x = 166,028.06

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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.