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Finding the Fourth Proportional to 339,994.95, 509,989.36 and 126,755.61

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Solution

The fourth proportional to 339,994.95, 509,989.36 and 126,755.61 is: 190,132.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,994.95 : 509,989.36 = 126,755.61 : x
  2. Step 2: Convert to fraction form
    339,994.95/509,989.36 = 126,755.61/x
  3. Step 3: Cross multiply
    339,994.95x = 509,989.36 × 126,755.61
  4. Step 4: Simplify right side
    339,994.95x = 64,644,012,420.31
  5. Step 5: Solve for x
    x = 64,644,012,420.31/339,994.95
  6. Step 6: Final answer
    x = 190,132.27

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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.