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Finding the Fourth Proportional to 231,919.20, 320,047.20 and 131,317.20

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Solution

The fourth proportional to 231,919.20, 320,047.20 and 131,317.20 is: 181,217.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,919.20 : 320,047.20 = 131,317.20 : x
  2. Step 2: Convert to fraction form
    231,919.20/320,047.20 = 131,317.20/x
  3. Step 3: Cross multiply
    231,919.20x = 320,047.20 × 131,317.20
  4. Step 4: Simplify right side
    231,919.20x = 42,027,702,171.84
  5. Step 5: Solve for x
    x = 42,027,702,171.84/231,919.20
  6. Step 6: Final answer
    x = 181,217.00

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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.