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Finding the Fourth Proportional to 208,872.03, 288,249.86 and 122,815.47

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Solution

The fourth proportional to 208,872.03, 288,249.86 and 122,815.47 is: 169,489.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,872.03 : 288,249.86 = 122,815.47 : x
  2. Step 2: Convert to fraction form
    208,872.03/288,249.86 = 122,815.47/x
  3. Step 3: Cross multiply
    208,872.03x = 288,249.86 × 122,815.47
  4. Step 4: Simplify right side
    208,872.03x = 35,401,542,730.47
  5. Step 5: Solve for x
    x = 35,401,542,730.47/208,872.03
  6. Step 6: Final answer
    x = 169,489.15

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1.5x scale

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.