Home / 139,269.38-208,904.06-76,939.88

Finding the Fourth Proportional to 139,269.38, 208,904.06 and 76,939.88

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Solution

The fourth proportional to 139,269.38, 208,904.06 and 76,939.88 is: 115,409.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,269.38 : 208,904.06 = 76,939.88 : x
  2. Step 2: Convert to fraction form
    139,269.38/208,904.06 = 76,939.88/x
  3. Step 3: Cross multiply
    139,269.38x = 208,904.06 × 76,939.88
  4. Step 4: Simplify right side
    139,269.38x = 16,073,052,455.74
  5. Step 5: Solve for x
    x = 16,073,052,455.74/139,269.38
  6. Step 6: Final answer
    x = 115,409.81

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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.