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Finding the Fourth Proportional to 245,443.71, 338,743.17 and 138,012.97

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Solution

The fourth proportional to 245,443.71, 338,743.17 and 138,012.97 is: 190,475.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,443.71 : 338,743.17 = 138,012.97 : x
  2. Step 2: Convert to fraction form
    245,443.71/338,743.17 = 138,012.97/x
  3. Step 3: Cross multiply
    245,443.71x = 338,743.17 × 138,012.97
  4. Step 4: Simplify right side
    245,443.71x = 46,750,950,864.80
  5. Step 5: Solve for x
    x = 46,750,950,864.80/245,443.71
  6. Step 6: Final answer
    x = 190,475.25

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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.