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Finding the Fourth Proportional to 245,900.30, 339,339.09 and 138,480.86

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Solution

The fourth proportional to 245,900.30, 339,339.09 and 138,480.86 is: 191,101.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,900.30 : 339,339.09 = 138,480.86 : x
  2. Step 2: Convert to fraction form
    245,900.30/339,339.09 = 138,480.86/x
  3. Step 3: Cross multiply
    245,900.30x = 339,339.09 × 138,480.86
  4. Step 4: Simplify right side
    245,900.30x = 46,991,969,014.82
  5. Step 5: Solve for x
    x = 46,991,969,014.82/245,900.30
  6. Step 6: Final answer
    x = 191,101.71

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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.