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Finding the Fourth Proportional to 74,491.60, 111,738.62 and 18,331.87

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Solution

The fourth proportional to 74,491.60, 111,738.62 and 18,331.87 is: 27,498.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,491.60 : 111,738.62 = 18,331.87 : x
  2. Step 2: Convert to fraction form
    74,491.60/111,738.62 = 18,331.87/x
  3. Step 3: Cross multiply
    74,491.60x = 111,738.62 × 18,331.87
  4. Step 4: Simplify right side
    74,491.60x = 2,048,377,855.82
  5. Step 5: Solve for x
    x = 2,048,377,855.82/74,491.60
  6. Step 6: Final answer
    x = 27,498.11

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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.