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Finding the Fourth Proportional to 74,662.98, 111,991.64 and 18,503.24

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Solution

The fourth proportional to 74,662.98, 111,991.64 and 18,503.24 is: 27,754.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,662.98 : 111,991.64 = 18,503.24 : x
  2. Step 2: Convert to fraction form
    74,662.98/111,991.64 = 18,503.24/x
  3. Step 3: Cross multiply
    74,662.98x = 111,991.64 × 18,503.24
  4. Step 4: Simplify right side
    74,662.98x = 2,072,208,192.91
  5. Step 5: Solve for x
    x = 2,072,208,192.91/74,662.98
  6. Step 6: Final answer
    x = 27,754.16

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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.