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Finding the Fourth Proportional to 159,586.11, 220,238.69 and 87,965.97

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Solution

The fourth proportional to 159,586.11, 220,238.69 and 87,965.97 is: 121,398.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,586.11 : 220,238.69 = 87,965.97 : x
  2. Step 2: Convert to fraction form
    159,586.11/220,238.69 = 87,965.97/x
  3. Step 3: Cross multiply
    159,586.11x = 220,238.69 × 87,965.97
  4. Step 4: Simplify right side
    159,586.11x = 19,373,509,557.55
  5. Step 5: Solve for x
    x = 19,373,509,557.55/159,586.11
  6. Step 6: Final answer
    x = 121,398.47

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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.