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Finding the Fourth Proportional to 245,514.54, 338,786.15 and 138,082.32

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Solution

The fourth proportional to 245,514.54, 338,786.15 and 138,082.32 is: 190,540.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,514.54 : 338,786.15 = 138,082.32 : x
  2. Step 2: Convert to fraction form
    245,514.54/338,786.15 = 138,082.32/x
  3. Step 3: Cross multiply
    245,514.54x = 338,786.15 × 138,082.32
  4. Step 4: Simplify right side
    245,514.54x = 46,780,376,885.46
  5. Step 5: Solve for x
    x = 46,780,376,885.46/245,514.54
  6. Step 6: Final answer
    x = 190,540.15

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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.