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Finding the Fourth Proportional to 127,961.37, 191,878.88 and 39,193.47

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Solution

The fourth proportional to 127,961.37, 191,878.88 and 39,193.47 is: 58,770.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,961.37 : 191,878.88 = 39,193.47 : x
  2. Step 2: Convert to fraction form
    127,961.37/191,878.88 = 39,193.47/x
  3. Step 3: Cross multiply
    127,961.37x = 191,878.88 × 39,193.47
  4. Step 4: Simplify right side
    127,961.37x = 7,520,398,930.95
  5. Step 5: Solve for x
    x = 7,520,398,930.95/127,961.37
  6. Step 6: Final answer
    x = 58,770.85

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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.