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Finding the Fourth Proportional to 159,189.91, 219,673.42 and 87,558.37

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Solution

The fourth proportional to 159,189.91, 219,673.42 and 87,558.37 is: 120,825.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,189.91 : 219,673.42 = 87,558.37 : x
  2. Step 2: Convert to fraction form
    159,189.91/219,673.42 = 87,558.37/x
  3. Step 3: Cross multiply
    159,189.91x = 219,673.42 × 87,558.37
  4. Step 4: Simplify right side
    159,189.91x = 19,234,246,587.53
  5. Step 5: Solve for x
    x = 19,234,246,587.53/159,189.91
  6. Step 6: Final answer
    x = 120,825.79

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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.