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Finding the Fourth Proportional to 245,123.87, 338,252.49 and 137,672.91

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Solution

The fourth proportional to 245,123.87, 338,252.49 and 137,672.91 is: 189,978.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,123.87 : 338,252.49 = 137,672.91 : x
  2. Step 2: Convert to fraction form
    245,123.87/338,252.49 = 137,672.91/x
  3. Step 3: Cross multiply
    245,123.87x = 338,252.49 × 137,672.91
  4. Step 4: Simplify right side
    245,123.87x = 46,568,204,613.05
  5. Step 5: Solve for x
    x = 46,568,204,613.05/245,123.87
  6. Step 6: Final answer
    x = 189,978.26

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1.5x scale

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.