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Finding the Fourth Proportional to 139,115.29, 208,967.99 and 131,016.91

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Solution

The fourth proportional to 139,115.29, 208,967.99 and 131,016.91 is: 196,803.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,115.29 : 208,967.99 = 131,016.91 : x
  2. Step 2: Convert to fraction form
    139,115.29/208,967.99 = 131,016.91/x
  3. Step 3: Cross multiply
    139,115.29x = 208,967.99 × 131,016.91
  4. Step 4: Simplify right side
    139,115.29x = 27,378,340,338.71
  5. Step 5: Solve for x
    x = 27,378,340,338.71/139,115.29
  6. Step 6: Final answer
    x = 196,803.24

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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.