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Finding the Fourth Proportional to 159,578.56, 220,217.30 and 87,958.64

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Solution

The fourth proportional to 159,578.56, 220,217.30 and 87,958.64 is: 121,382.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,578.56 : 220,217.30 = 87,958.64 : x
  2. Step 2: Convert to fraction form
    159,578.56/220,217.30 = 87,958.64/x
  3. Step 3: Cross multiply
    159,578.56x = 220,217.30 × 87,958.64
  4. Step 4: Simplify right side
    159,578.56x = 19,370,014,212.47
  5. Step 5: Solve for x
    x = 19,370,014,212.47/159,578.56
  6. Step 6: Final answer
    x = 121,382.31

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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.