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Finding the Fourth Proportional to 339,419.88, 509,131.80 and 114,781.92

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Solution

The fourth proportional to 339,419.88, 509,131.80 and 114,781.92 is: 172,173.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,419.88 : 509,131.80 = 114,781.92 : x
  2. Step 2: Convert to fraction form
    339,419.88/509,131.80 = 114,781.92/x
  3. Step 3: Cross multiply
    339,419.88x = 509,131.80 × 114,781.92
  4. Step 4: Simplify right side
    339,419.88x = 58,439,125,537.06
  5. Step 5: Solve for x
    x = 58,439,125,537.06/339,419.88
  6. Step 6: Final answer
    x = 172,173.55

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.