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Finding the Fourth Proportional to 245,882.92, 339,317.94 and 138,453.40

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Solution

The fourth proportional to 245,882.92, 339,317.94 and 138,453.40 is: 191,065.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,882.92 : 339,317.94 = 138,453.40 : x
  2. Step 2: Convert to fraction form
    245,882.92/339,317.94 = 138,453.40/x
  3. Step 3: Cross multiply
    245,882.92x = 339,317.94 × 138,453.40
  4. Step 4: Simplify right side
    245,882.92x = 46,979,722,474.00
  5. Step 5: Solve for x
    x = 46,979,722,474.00/245,882.92
  6. Step 6: Final answer
    x = 191,065.42

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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.