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Finding the Fourth Proportional to 159,321.59, 219,863.74 and 87,701.25

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Solution

The fourth proportional to 159,321.59, 219,863.74 and 87,701.25 is: 121,027.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,321.59 : 219,863.74 = 87,701.25 : x
  2. Step 2: Convert to fraction form
    159,321.59/219,863.74 = 87,701.25/x
  3. Step 3: Cross multiply
    159,321.59x = 219,863.74 × 87,701.25
  4. Step 4: Simplify right side
    159,321.59x = 19,282,324,827.68
  5. Step 5: Solve for x
    x = 19,282,324,827.68/159,321.59
  6. Step 6: Final answer
    x = 121,027.70

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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.