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Finding the Fourth Proportional to 139,588.05, 209,383.22 and 39,748.12

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Solution

The fourth proportional to 139,588.05, 209,383.22 and 39,748.12 is: 59,622.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,588.05 : 209,383.22 = 39,748.12 : x
  2. Step 2: Convert to fraction form
    139,588.05/209,383.22 = 39,748.12/x
  3. Step 3: Cross multiply
    139,588.05x = 209,383.22 × 39,748.12
  4. Step 4: Simplify right side
    139,588.05x = 8,322,589,354.55
  5. Step 5: Solve for x
    x = 8,322,589,354.55/139,588.05
  6. Step 6: Final answer
    x = 59,622.51

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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.