Home / 87,149.78-120,266.70-49,424.03

Finding the Fourth Proportional to 87,149.78, 120,266.70 and 49,424.03

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Solution

The fourth proportional to 87,149.78, 120,266.70 and 49,424.03 is: 68,205.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,149.78 : 120,266.70 = 49,424.03 : x
  2. Step 2: Convert to fraction form
    87,149.78/120,266.70 = 49,424.03/x
  3. Step 3: Cross multiply
    87,149.78x = 120,266.70 × 49,424.03
  4. Step 4: Simplify right side
    87,149.78x = 5,944,064,988.80
  5. Step 5: Solve for x
    x = 5,944,064,988.80/87,149.78
  6. Step 6: Final answer
    x = 68,205.16

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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.