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Finding the Fourth Proportional to 74,064, 111,096 and 18,660

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Solution

The fourth proportional to 74,064, 111,096 and 18,660 is: 27,990

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,064 : 111,096 = 18,660 : x
  2. Step 2: Convert to fraction form
    74,064/111,096 = 18,660/x
  3. Step 3: Cross multiply
    74,064x = 111,096 × 18,660
  4. Step 4: Simplify right side
    74,064x = 2,073,051,360
  5. Step 5: Solve for x
    x = 2,073,051,360/74,064
  6. Step 6: Final answer
    x = 27,990

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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.