Home / 81,860.87-112,997.88-51,665.85

Finding the Fourth Proportional to 81,860.87, 112,997.88 and 51,665.85

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Solution

The fourth proportional to 81,860.87, 112,997.88 and 51,665.85 is: 71,317.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,860.87 : 112,997.88 = 51,665.85 : x
  2. Step 2: Convert to fraction form
    81,860.87/112,997.88 = 51,665.85/x
  3. Step 3: Cross multiply
    81,860.87x = 112,997.88 × 51,665.85
  4. Step 4: Simplify right side
    81,860.87x = 5,838,131,518.40
  5. Step 5: Solve for x
    x = 5,838,131,518.40/81,860.87
  6. Step 6: Final answer
    x = 71,317.73

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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.