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Finding the Fourth Proportional to 339,878.74, 509,520.03 and 129,376.66

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Solution

The fourth proportional to 339,878.74, 509,520.03 and 129,376.66 is: 193,951.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,878.74 : 509,520.03 = 129,376.66 : x
  2. Step 2: Convert to fraction form
    339,878.74/509,520.03 = 129,376.66/x
  3. Step 3: Cross multiply
    339,878.74x = 509,520.03 × 129,376.66
  4. Step 4: Simplify right side
    339,878.74x = 65,919,999,684.50
  5. Step 5: Solve for x
    x = 65,919,999,684.50/339,878.74
  6. Step 6: Final answer
    x = 193,951.52

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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.