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Finding the Fourth Proportional to 158,889.38, 219,286.80 and 91,821.38

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Solution

The fourth proportional to 158,889.38, 219,286.80 and 91,821.38 is: 126,724.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,889.38 : 219,286.80 = 91,821.38 : x
  2. Step 2: Convert to fraction form
    158,889.38/219,286.80 = 91,821.38/x
  3. Step 3: Cross multiply
    158,889.38x = 219,286.80 × 91,821.38
  4. Step 4: Simplify right side
    158,889.38x = 20,135,215,495.35
  5. Step 5: Solve for x
    x = 20,135,215,495.35/158,889.38
  6. Step 6: Final answer
    x = 126,724.74

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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.