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Finding the Fourth Proportional to 49,997.40, 68,996.40 and 28,780.80

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Solution

The fourth proportional to 49,997.40, 68,996.40 and 28,780.80 is: 39,717.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    49,997.40 : 68,996.40 = 28,780.80 : x
  2. Step 2: Convert to fraction form
    49,997.40/68,996.40 = 28,780.80/x
  3. Step 3: Cross multiply
    49,997.40x = 68,996.40 × 28,780.80
  4. Step 4: Simplify right side
    49,997.40x = 1,985,771,589.12
  5. Step 5: Solve for x
    x = 1,985,771,589.12/49,997.40
  6. Step 6: Final answer
    x = 39,717.50

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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.