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Finding the Fourth Proportional to 239,178, 330,065.64 and 131,747.70

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Solution

The fourth proportional to 239,178, 330,065.64 and 131,747.70 is: 181,811.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,178 : 330,065.64 = 131,747.70 : x
  2. Step 2: Convert to fraction form
    239,178/330,065.64 = 131,747.70/x
  3. Step 3: Cross multiply
    239,178x = 330,065.64 × 131,747.70
  4. Step 4: Simplify right side
    239,178x = 43,485,388,919.03
  5. Step 5: Solve for x
    x = 43,485,388,919.03/239,178
  6. Step 6: Final answer
    x = 181,811.83

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.