Home / 87,979.35-131,969.30-21,419.49

Finding the Fourth Proportional to 87,979.35, 131,969.30 and 21,419.49

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Solution

The fourth proportional to 87,979.35, 131,969.30 and 21,419.49 is: 32,129.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,979.35 : 131,969.30 = 21,419.49 : x
  2. Step 2: Convert to fraction form
    87,979.35/131,969.30 = 21,419.49/x
  3. Step 3: Cross multiply
    87,979.35x = 131,969.30 × 21,419.49
  4. Step 4: Simplify right side
    87,979.35x = 2,826,714,994.56
  5. Step 5: Solve for x
    x = 2,826,714,994.56/87,979.35
  6. Step 6: Final answer
    x = 32,129.30

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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.