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Finding the Fourth Proportional to 245,879.26, 339,310.14 and 138,459.90

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Solution

The fourth proportional to 245,879.26, 339,310.14 and 138,459.90 is: 191,072.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,879.26 : 339,310.14 = 138,459.90 : x
  2. Step 2: Convert to fraction form
    245,879.26/339,310.14 = 138,459.90/x
  3. Step 3: Cross multiply
    245,879.26x = 339,310.14 × 138,459.90
  4. Step 4: Simplify right side
    245,879.26x = 46,980,848,053.39
  5. Step 5: Solve for x
    x = 46,980,848,053.39/245,879.26
  6. Step 6: Final answer
    x = 191,072.84

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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.