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Finding the Fourth Proportional to 139,469.50, 209,963.23 and 127,069.21

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Solution

The fourth proportional to 139,469.50, 209,963.23 and 127,069.21 is: 191,295.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,469.50 : 209,963.23 = 127,069.21 : x
  2. Step 2: Convert to fraction form
    139,469.50/209,963.23 = 127,069.21/x
  3. Step 3: Cross multiply
    139,469.50x = 209,963.23 × 127,069.21
  4. Step 4: Simplify right side
    139,469.50x = 26,679,861,765.15
  5. Step 5: Solve for x
    x = 26,679,861,765.15/139,469.50
  6. Step 6: Final answer
    x = 191,295.31

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.