Home / 87,678.70-120,997.14-47,392.36

Finding the Fourth Proportional to 87,678.70, 120,997.14 and 47,392.36

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Solution

The fourth proportional to 87,678.70, 120,997.14 and 47,392.36 is: 65,401.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,678.70 : 120,997.14 = 47,392.36 : x
  2. Step 2: Convert to fraction form
    87,678.70/120,997.14 = 47,392.36/x
  3. Step 3: Cross multiply
    87,678.70x = 120,997.14 × 47,392.36
  4. Step 4: Simplify right side
    87,678.70x = 5,734,340,017.85
  5. Step 5: Solve for x
    x = 5,734,340,017.85/87,678.70
  6. Step 6: Final answer
    x = 65,401.75

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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.