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Finding the Fourth Proportional to 221,040.30, 305,035.51 and 120,438.30

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Solution

The fourth proportional to 221,040.30, 305,035.51 and 120,438.30 is: 166,204.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,040.30 : 305,035.51 = 120,438.30 : x
  2. Step 2: Convert to fraction form
    221,040.30/305,035.51 = 120,438.30/x
  3. Step 3: Cross multiply
    221,040.30x = 305,035.51 × 120,438.30
  4. Step 4: Simplify right side
    221,040.30x = 36,737,958,264.03
  5. Step 5: Solve for x
    x = 36,737,958,264.03/221,040.30
  6. Step 6: Final answer
    x = 166,204.80

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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.