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Finding the Fourth Proportional to 245,450.74, 338,724.03 and 138,019.82

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Solution

The fourth proportional to 245,450.74, 338,724.03 and 138,019.82 is: 190,468.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,450.74 : 338,724.03 = 138,019.82 : x
  2. Step 2: Convert to fraction form
    245,450.74/338,724.03 = 138,019.82/x
  3. Step 3: Cross multiply
    245,450.74x = 338,724.03 × 138,019.82
  4. Step 4: Simplify right side
    245,450.74x = 46,750,629,650.27
  5. Step 5: Solve for x
    x = 46,750,629,650.27/245,450.74
  6. Step 6: Final answer
    x = 190,468.48

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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.