Home / 87,988.89-131,981.94-21,428.91

Finding the Fourth Proportional to 87,988.89, 131,981.94 and 21,428.91

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Solution

The fourth proportional to 87,988.89, 131,981.94 and 21,428.91 is: 32,143.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,988.89 : 131,981.94 = 21,428.91 : x
  2. Step 2: Convert to fraction form
    87,988.89/131,981.94 = 21,428.91/x
  3. Step 3: Cross multiply
    87,988.89x = 131,981.94 × 21,428.91
  4. Step 4: Simplify right side
    87,988.89x = 2,828,229,113.89
  5. Step 5: Solve for x
    x = 2,828,229,113.89/87,988.89
  6. Step 6: Final answer
    x = 32,143.03

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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.