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Finding the Fourth Proportional to 139,828.32, 209,616.48 and 51,019.44

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Solution

The fourth proportional to 139,828.32, 209,616.48 and 51,019.44 is: 76,483.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,828.32 : 209,616.48 = 51,019.44 : x
  2. Step 2: Convert to fraction form
    139,828.32/209,616.48 = 51,019.44/x
  3. Step 3: Cross multiply
    139,828.32x = 209,616.48 × 51,019.44
  4. Step 4: Simplify right side
    139,828.32x = 10,694,515,424.37
  5. Step 5: Solve for x
    x = 10,694,515,424.37/139,828.32
  6. Step 6: Final answer
    x = 76,483.19

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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.