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Finding the Fourth Proportional to 139,889.92, 209,805.44 and 51,185.28

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Solution

The fourth proportional to 139,889.92, 209,805.44 and 51,185.28 is: 76,767.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,889.92 : 209,805.44 = 51,185.28 : x
  2. Step 2: Convert to fraction form
    139,889.92/209,805.44 = 51,185.28/x
  3. Step 3: Cross multiply
    139,889.92x = 209,805.44 × 51,185.28
  4. Step 4: Simplify right side
    139,889.92x = 10,738,950,191.92
  5. Step 5: Solve for x
    x = 10,738,950,191.92/139,889.92
  6. Step 6: Final answer
    x = 76,767.15

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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.