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Finding the Fourth Proportional to 245,825.64, 339,213.42 and 138,393.72

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Solution

The fourth proportional to 245,825.64, 339,213.42 and 138,393.72 is: 190,968.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,825.64 : 339,213.42 = 138,393.72 : x
  2. Step 2: Convert to fraction form
    245,825.64/339,213.42 = 138,393.72/x
  3. Step 3: Cross multiply
    245,825.64x = 339,213.42 × 138,393.72
  4. Step 4: Simplify right side
    245,825.64x = 46,945,007,067.72
  5. Step 5: Solve for x
    x = 46,945,007,067.72/245,825.64
  6. Step 6: Final answer
    x = 190,968.72

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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.