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Finding the Fourth Proportional to 71,490.70, 107,236.82 and 21,571.24

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Solution

The fourth proportional to 71,490.70, 107,236.82 and 21,571.24 is: 32,357.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,490.70 : 107,236.82 = 21,571.24 : x
  2. Step 2: Convert to fraction form
    71,490.70/107,236.82 = 21,571.24/x
  3. Step 3: Cross multiply
    71,490.70x = 107,236.82 × 21,571.24
  4. Step 4: Simplify right side
    71,490.70x = 2,313,231,181.06
  5. Step 5: Solve for x
    x = 2,313,231,181.06/71,490.70
  6. Step 6: Final answer
    x = 32,357.09

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1.5x scale

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.