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Finding the Fourth Proportional to 297,162.11, 445,743.11 and 139,390.56

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Solution

The fourth proportional to 297,162.11, 445,743.11 and 139,390.56 is: 209,085.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    297,162.11 : 445,743.11 = 139,390.56 : x
  2. Step 2: Convert to fraction form
    297,162.11/445,743.11 = 139,390.56/x
  3. Step 3: Cross multiply
    297,162.11x = 445,743.11 × 139,390.56
  4. Step 4: Simplify right side
    297,162.11x = 62,132,382,067.52
  5. Step 5: Solve for x
    x = 62,132,382,067.52/297,162.11
  6. Step 6: Final answer
    x = 209,085.81

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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.