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Finding the Fourth Proportional to 339,745.19, 509,847.41 and 129,377.66

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Solution

The fourth proportional to 339,745.19, 509,847.41 and 129,377.66 is: 194,153.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,745.19 : 509,847.41 = 129,377.66 : x
  2. Step 2: Convert to fraction form
    339,745.19/509,847.41 = 129,377.66/x
  3. Step 3: Cross multiply
    339,745.19x = 509,847.41 × 129,377.66
  4. Step 4: Simplify right side
    339,745.19x = 65,962,862,637.07
  5. Step 5: Solve for x
    x = 65,962,862,637.07/339,745.19
  6. Step 6: Final answer
    x = 194,153.93

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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.