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Finding the Fourth Proportional to 221,239.73, 305,310.79 and 120,637.73

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Solution

The fourth proportional to 221,239.73, 305,310.79 and 120,637.73 is: 166,480.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,239.73 : 305,310.79 = 120,637.73 : x
  2. Step 2: Convert to fraction form
    221,239.73/305,310.79 = 120,637.73/x
  3. Step 3: Cross multiply
    221,239.73x = 305,310.79 × 120,637.73
  4. Step 4: Simplify right side
    221,239.73x = 36,832,000,650.11
  5. Step 5: Solve for x
    x = 36,832,000,650.11/221,239.73
  6. Step 6: Final answer
    x = 166,480.05

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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.