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Finding the Fourth Proportional to 219,571.17, 302,976.15 and 128,956.33

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Solution

The fourth proportional to 219,571.17, 302,976.15 and 128,956.33 is: 177,940.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,571.17 : 302,976.15 = 128,956.33 : x
  2. Step 2: Convert to fraction form
    219,571.17/302,976.15 = 128,956.33/x
  3. Step 3: Cross multiply
    219,571.17x = 302,976.15 × 128,956.33
  4. Step 4: Simplify right side
    219,571.17x = 39,070,691,659.27
  5. Step 5: Solve for x
    x = 39,070,691,659.27/219,571.17
  6. Step 6: Final answer
    x = 177,940.90

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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.