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Finding the Fourth Proportional to 200,076.99, 300,155.99 and 81,757.86

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Solution

The fourth proportional to 200,076.99, 300,155.99 and 81,757.86 is: 122,653.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    200,076.99 : 300,155.99 = 81,757.86 : x
  2. Step 2: Convert to fraction form
    200,076.99/300,155.99 = 81,757.86/x
  3. Step 3: Cross multiply
    200,076.99x = 300,155.99 × 81,757.86
  4. Step 4: Simplify right side
    200,076.99x = 24,540,110,999.79
  5. Step 5: Solve for x
    x = 24,540,110,999.79/200,076.99
  6. Step 6: Final answer
    x = 122,653.34

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1.5x scale

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.