Home / 77,331.85-115,997.83-21,172.42

Finding the Fourth Proportional to 77,331.85, 115,997.83 and 21,172.42

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Solution

The fourth proportional to 77,331.85, 115,997.83 and 21,172.42 is: 31,758.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,331.85 : 115,997.83 = 21,172.42 : x
  2. Step 2: Convert to fraction form
    77,331.85/115,997.83 = 21,172.42/x
  3. Step 3: Cross multiply
    77,331.85x = 115,997.83 × 21,172.42
  4. Step 4: Simplify right side
    77,331.85x = 2,455,954,669.99
  5. Step 5: Solve for x
    x = 2,455,954,669.99/77,331.85
  6. Step 6: Final answer
    x = 31,758.65

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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.