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Finding the Fourth Proportional to 136,874.81, 205,345.13 and 43,380.56

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Solution

The fourth proportional to 136,874.81, 205,345.13 and 43,380.56 is: 65,081.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,874.81 : 205,345.13 = 43,380.56 : x
  2. Step 2: Convert to fraction form
    136,874.81/205,345.13 = 43,380.56/x
  3. Step 3: Cross multiply
    136,874.81x = 205,345.13 × 43,380.56
  4. Step 4: Simplify right side
    136,874.81x = 8,907,987,029.13
  5. Step 5: Solve for x
    x = 8,907,987,029.13/136,874.81
  6. Step 6: Final answer
    x = 65,081.27

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.