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Finding the Fourth Proportional to 74,098.21, 111,127.49 and 20,787.01

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Solution

The fourth proportional to 74,098.21, 111,127.49 and 20,787.01 is: 31,174.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,098.21 : 111,127.49 = 20,787.01 : x
  2. Step 2: Convert to fraction form
    74,098.21/111,127.49 = 20,787.01/x
  3. Step 3: Cross multiply
    74,098.21x = 111,127.49 × 20,787.01
  4. Step 4: Simplify right side
    74,098.21x = 2,310,008,245.90
  5. Step 5: Solve for x
    x = 2,310,008,245.90/74,098.21
  6. Step 6: Final answer
    x = 31,174.95

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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.