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Finding the Fourth Proportional to 245,791.33, 339,191.15 and 138,361.64

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Solution

The fourth proportional to 245,791.33, 339,191.15 and 138,361.64 is: 190,938.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,791.33 : 339,191.15 = 138,361.64 : x
  2. Step 2: Convert to fraction form
    245,791.33/339,191.15 = 138,361.64/x
  3. Step 3: Cross multiply
    245,791.33x = 339,191.15 × 138,361.64
  4. Step 4: Simplify right side
    245,791.33x = 46,931,041,399.72
  5. Step 5: Solve for x
    x = 46,931,041,399.72/245,791.33
  6. Step 6: Final answer
    x = 190,938.56

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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.