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Finding the Fourth Proportional to 245,880.26, 339,311.52 and 138,460.90

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Solution

The fourth proportional to 245,880.26, 339,311.52 and 138,460.90 is: 191,074.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,880.26 : 339,311.52 = 138,460.90 : x
  2. Step 2: Convert to fraction form
    245,880.26/339,311.52 = 138,460.90/x
  3. Step 3: Cross multiply
    245,880.26x = 339,311.52 × 138,460.90
  4. Step 4: Simplify right side
    245,880.26x = 46,981,378,439.57
  5. Step 5: Solve for x
    x = 46,981,378,439.57/245,880.26
  6. Step 6: Final answer
    x = 191,074.22

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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.