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Finding the Fourth Proportional to 245,464.78, 338,739.11 and 138,035.54

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Solution

The fourth proportional to 245,464.78, 338,739.11 and 138,035.54 is: 190,487.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,464.78 : 338,739.11 = 138,035.54 : x
  2. Step 2: Convert to fraction form
    245,464.78/338,739.11 = 138,035.54/x
  3. Step 3: Cross multiply
    245,464.78x = 338,739.11 × 138,035.54
  4. Step 4: Simplify right side
    245,464.78x = 46,758,037,418.72
  5. Step 5: Solve for x
    x = 46,758,037,418.72/245,464.78
  6. Step 6: Final answer
    x = 190,487.77

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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.