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Finding the Fourth Proportional to 221,279.60, 305,393.28 and 135,220.88

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Solution

The fourth proportional to 221,279.60, 305,393.28 and 135,220.88 is: 186,621.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,279.60 : 305,393.28 = 135,220.88 : x
  2. Step 2: Convert to fraction form
    221,279.60/305,393.28 = 135,220.88/x
  3. Step 3: Cross multiply
    221,279.60x = 305,393.28 × 135,220.88
  4. Step 4: Simplify right side
    221,279.60x = 41,295,548,067.69
  5. Step 5: Solve for x
    x = 41,295,548,067.69/221,279.60
  6. Step 6: Final answer
    x = 186,621.58

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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.