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Finding the Fourth Proportional to 245,497.70, 338,747.46 and 138,067.40

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Solution

The fourth proportional to 245,497.70, 338,747.46 and 138,067.40 is: 190,510.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,497.70 : 338,747.46 = 138,067.40 : x
  2. Step 2: Convert to fraction form
    245,497.70/338,747.46 = 138,067.40/x
  3. Step 3: Cross multiply
    245,497.70x = 338,747.46 × 138,067.40
  4. Step 4: Simplify right side
    245,497.70x = 46,769,981,058.80
  5. Step 5: Solve for x
    x = 46,769,981,058.80/245,497.70
  6. Step 6: Final answer
    x = 190,510.87

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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.