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Finding the Fourth Proportional to 245,626.25, 338,961.83 and 136,728.86

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Solution

The fourth proportional to 245,626.25, 338,961.83 and 136,728.86 is: 188,684.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,626.25 : 338,961.83 = 136,728.86 : x
  2. Step 2: Convert to fraction form
    245,626.25/338,961.83 = 136,728.86/x
  3. Step 3: Cross multiply
    245,626.25x = 338,961.83 × 136,728.86
  4. Step 4: Simplify right side
    245,626.25x = 46,345,864,599.41
  5. Step 5: Solve for x
    x = 46,345,864,599.41/245,626.25
  6. Step 6: Final answer
    x = 188,684.49

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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.