Home / 86,991.57-120,042.68-51,174.66

Finding the Fourth Proportional to 86,991.57, 120,042.68 and 51,174.66

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Solution

The fourth proportional to 86,991.57, 120,042.68 and 51,174.66 is: 70,617.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,991.57 : 120,042.68 = 51,174.66 : x
  2. Step 2: Convert to fraction form
    86,991.57/120,042.68 = 51,174.66/x
  3. Step 3: Cross multiply
    86,991.57x = 120,042.68 × 51,174.66
  4. Step 4: Simplify right side
    86,991.57x = 6,143,143,622.94
  5. Step 5: Solve for x
    x = 6,143,143,622.94/86,991.57
  6. Step 6: Final answer
    x = 70,617.69

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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.