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Finding the Fourth Proportional to 149,221.18, 205,469.20 and 112,480.78

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Solution

The fourth proportional to 149,221.18, 205,469.20 and 112,480.78 is: 154,879.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,221.18 : 205,469.20 = 112,480.78 : x
  2. Step 2: Convert to fraction form
    149,221.18/205,469.20 = 112,480.78/x
  3. Step 3: Cross multiply
    149,221.18x = 205,469.20 × 112,480.78
  4. Step 4: Simplify right side
    149,221.18x = 23,111,335,881.98
  5. Step 5: Solve for x
    x = 23,111,335,881.98/149,221.18
  6. Step 6: Final answer
    x = 154,879.73

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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.