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Finding the Fourth Proportional to 109,480.40, 163,961.40 and 74,229.20

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Solution

The fourth proportional to 109,480.40, 163,961.40 and 74,229.20 is: 111,168.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,480.40 : 163,961.40 = 74,229.20 : x
  2. Step 2: Convert to fraction form
    109,480.40/163,961.40 = 74,229.20/x
  3. Step 3: Cross multiply
    109,480.40x = 163,961.40 × 74,229.20
  4. Step 4: Simplify right side
    109,480.40x = 12,170,723,552.88
  5. Step 5: Solve for x
    x = 12,170,723,552.88/109,480.40
  6. Step 6: Final answer
    x = 111,168.06

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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.