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Finding the Fourth Proportional to 74,171.46, 111,256.20 and 18,012

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Solution

The fourth proportional to 74,171.46, 111,256.20 and 18,012 is: 27,017.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,171.46 : 111,256.20 = 18,012 : x
  2. Step 2: Convert to fraction form
    74,171.46/111,256.20 = 18,012/x
  3. Step 3: Cross multiply
    74,171.46x = 111,256.20 × 18,012
  4. Step 4: Simplify right side
    74,171.46x = 2,003,946,674.40
  5. Step 5: Solve for x
    x = 2,003,946,674.40/74,171.46
  6. Step 6: Final answer
    x = 27,017.76

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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.