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Finding the Fourth Proportional to 71,453.70, 98,601.30 and 39,621.42

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Solution

The fourth proportional to 71,453.70, 98,601.30 and 39,621.42 is: 54,674.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,453.70 : 98,601.30 = 39,621.42 : x
  2. Step 2: Convert to fraction form
    71,453.70/98,601.30 = 39,621.42/x
  3. Step 3: Cross multiply
    71,453.70x = 98,601.30 × 39,621.42
  4. Step 4: Simplify right side
    71,453.70x = 3,906,723,519.85
  5. Step 5: Solve for x
    x = 3,906,723,519.85/71,453.70
  6. Step 6: Final answer
    x = 54,674.89

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1.5x scale

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.