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Finding the Fourth Proportional to 49,997.70, 74,996.55 and 20,400.30

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Solution

The fourth proportional to 49,997.70, 74,996.55 and 20,400.30 is: 30,600.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    49,997.70 : 74,996.55 = 20,400.30 : x
  2. Step 2: Convert to fraction form
    49,997.70/74,996.55 = 20,400.30/x
  3. Step 3: Cross multiply
    49,997.70x = 74,996.55 × 20,400.30
  4. Step 4: Simplify right side
    49,997.70x = 1,529,952,118.97
  5. Step 5: Solve for x
    x = 1,529,952,118.97/49,997.70
  6. Step 6: Final answer
    x = 30,600.45

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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.