Home / 115,418.20-173,127.30-76,019.80

Finding the Fourth Proportional to 115,418.20, 173,127.30 and 76,019.80

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Solution

The fourth proportional to 115,418.20, 173,127.30 and 76,019.80 is: 114,029.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,418.20 : 173,127.30 = 76,019.80 : x
  2. Step 2: Convert to fraction form
    115,418.20/173,127.30 = 76,019.80/x
  3. Step 3: Cross multiply
    115,418.20x = 173,127.30 × 76,019.80
  4. Step 4: Simplify right side
    115,418.20x = 13,161,102,720.54
  5. Step 5: Solve for x
    x = 13,161,102,720.54/115,418.20
  6. Step 6: Final answer
    x = 114,029.70

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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.