Home / 159,406.20-219,981.96-87,788.70

Finding the Fourth Proportional to 159,406.20, 219,981.96 and 87,788.70

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Solution

The fourth proportional to 159,406.20, 219,981.96 and 87,788.70 is: 121,149.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,406.20 : 219,981.96 = 87,788.70 : x
  2. Step 2: Convert to fraction form
    159,406.20/219,981.96 = 87,788.70/x
  3. Step 3: Cross multiply
    159,406.20x = 219,981.96 × 87,788.70
  4. Step 4: Simplify right side
    159,406.20x = 19,311,930,291.85
  5. Step 5: Solve for x
    x = 19,311,930,291.85/159,406.20
  6. Step 6: Final answer
    x = 121,149.18

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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.