Home / 87,981.11-131,970.54-21,421.31

Finding the Fourth Proportional to 87,981.11, 131,970.54 and 21,421.31

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Solution

The fourth proportional to 87,981.11, 131,970.54 and 21,421.31 is: 32,131.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,981.11 : 131,970.54 = 21,421.31 : x
  2. Step 2: Convert to fraction form
    87,981.11/131,970.54 = 21,421.31/x
  3. Step 3: Cross multiply
    87,981.11x = 131,970.54 × 21,421.31
  4. Step 4: Simplify right side
    87,981.11x = 2,826,981,848.21
  5. Step 5: Solve for x
    x = 2,826,981,848.21/87,981.11
  6. Step 6: Final answer
    x = 32,131.69

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.