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Finding the Fourth Proportional to 139,596, 209,461.20 and 69,481.44

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Solution

The fourth proportional to 139,596, 209,461.20 and 69,481.44 is: 104,255.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,596 : 209,461.20 = 69,481.44 : x
  2. Step 2: Convert to fraction form
    139,596/209,461.20 = 69,481.44/x
  3. Step 3: Cross multiply
    139,596x = 209,461.20 × 69,481.44
  4. Step 4: Simplify right side
    139,596x = 14,553,665,800.13
  5. Step 5: Solve for x
    x = 14,553,665,800.13/139,596
  6. Step 6: Final answer
    x = 104,255.61

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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.