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Finding the Fourth Proportional to 73,297.71, 109,936.85 and 20,711.30

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Solution

The fourth proportional to 73,297.71, 109,936.85 and 20,711.30 is: 31,064.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,297.71 : 109,936.85 = 20,711.30 : x
  2. Step 2: Convert to fraction form
    73,297.71/109,936.85 = 20,711.30/x
  3. Step 3: Cross multiply
    73,297.71x = 109,936.85 × 20,711.30
  4. Step 4: Simplify right side
    73,297.71x = 2,276,934,428.16
  5. Step 5: Solve for x
    x = 2,276,934,428.16/73,297.71
  6. Step 6: Final answer
    x = 31,064.20

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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.