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Finding the Fourth Proportional to 139,479.84, 209,221.22 and 55,260.50

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Solution

The fourth proportional to 139,479.84, 209,221.22 and 55,260.50 is: 82,891.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,479.84 : 209,221.22 = 55,260.50 : x
  2. Step 2: Convert to fraction form
    139,479.84/209,221.22 = 55,260.50/x
  3. Step 3: Cross multiply
    139,479.84x = 209,221.22 × 55,260.50
  4. Step 4: Simplify right side
    139,479.84x = 11,561,669,227.81
  5. Step 5: Solve for x
    x = 11,561,669,227.81/139,479.84
  6. Step 6: Final answer
    x = 82,891.33

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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.