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Finding the Fourth Proportional to 139,595.50, 207,814.46 and 138,765.12

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Solution

The fourth proportional to 139,595.50, 207,814.46 and 138,765.12 is: 206,578.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,595.50 : 207,814.46 = 138,765.12 : x
  2. Step 2: Convert to fraction form
    139,595.50/207,814.46 = 138,765.12/x
  3. Step 3: Cross multiply
    139,595.50x = 207,814.46 × 138,765.12
  4. Step 4: Simplify right side
    139,595.50x = 28,837,399,540.49
  5. Step 5: Solve for x
    x = 28,837,399,540.49/139,595.50
  6. Step 6: Final answer
    x = 206,578.29

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.