Home / 87,979.12-131,968.94-21,419.24

Finding the Fourth Proportional to 87,979.12, 131,968.94 and 21,419.24

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Solution

The fourth proportional to 87,979.12, 131,968.94 and 21,419.24 is: 32,128.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,979.12 : 131,968.94 = 21,419.24 : x
  2. Step 2: Convert to fraction form
    87,979.12/131,968.94 = 21,419.24/x
  3. Step 3: Cross multiply
    87,979.12x = 131,968.94 × 21,419.24
  4. Step 4: Simplify right side
    87,979.12x = 2,826,674,398.41
  5. Step 5: Solve for x
    x = 2,826,674,398.41/87,979.12
  6. Step 6: Final answer
    x = 32,128.92

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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.