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Finding the Fourth Proportional to 245,805.52, 339,218.08 and 138,379.48

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Solution

The fourth proportional to 245,805.52, 339,218.08 and 138,379.48 is: 190,967.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,805.52 : 339,218.08 = 138,379.48 : x
  2. Step 2: Convert to fraction form
    245,805.52/339,218.08 = 138,379.48/x
  3. Step 3: Cross multiply
    245,805.52x = 339,218.08 × 138,379.48
  4. Step 4: Simplify right side
    245,805.52x = 46,940,821,517.00
  5. Step 5: Solve for x
    x = 46,940,821,517.00/245,805.52
  6. Step 6: Final answer
    x = 190,967.32

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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.