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Finding the Fourth Proportional to 220,228.89, 303,910.78 and 128,342.32

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Solution

The fourth proportional to 220,228.89, 303,910.78 and 128,342.32 is: 177,109.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,228.89 : 303,910.78 = 128,342.32 : x
  2. Step 2: Convert to fraction form
    220,228.89/303,910.78 = 128,342.32/x
  3. Step 3: Cross multiply
    220,228.89x = 303,910.78 × 128,342.32
  4. Step 4: Simplify right side
    220,228.89x = 39,004,615,086.75
  5. Step 5: Solve for x
    x = 39,004,615,086.75/220,228.89
  6. Step 6: Final answer
    x = 177,109.44

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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.