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Finding the Fourth Proportional to 245,613.52, 338,943.30 and 138,183.72

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Solution

The fourth proportional to 245,613.52, 338,943.30 and 138,183.72 is: 190,691.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,613.52 : 338,943.30 = 138,183.72 : x
  2. Step 2: Convert to fraction form
    245,613.52/338,943.30 = 138,183.72/x
  3. Step 3: Cross multiply
    245,613.52x = 338,943.30 × 138,183.72
  4. Step 4: Simplify right side
    245,613.52x = 46,836,446,063.08
  5. Step 5: Solve for x
    x = 46,836,446,063.08/245,613.52
  6. Step 6: Final answer
    x = 190,691.64

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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.