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Finding the Fourth Proportional to 85,399.63, 117,850.89 and 47,161.56

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Solution

The fourth proportional to 85,399.63, 117,850.89 and 47,161.56 is: 65,082.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,399.63 : 117,850.89 = 47,161.56 : x
  2. Step 2: Convert to fraction form
    85,399.63/117,850.89 = 47,161.56/x
  3. Step 3: Cross multiply
    85,399.63x = 117,850.89 × 47,161.56
  4. Step 4: Simplify right side
    85,399.63x = 5,558,031,819.79
  5. Step 5: Solve for x
    x = 5,558,031,819.79/85,399.63
  6. Step 6: Final answer
    x = 65,082.62

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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.