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Finding the Fourth Proportional to 66,012.68, 99,012 and 18,626.60

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Solution

The fourth proportional to 66,012.68, 99,012 and 18,626.60 is: 27,937.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,012.68 : 99,012 = 18,626.60 : x
  2. Step 2: Convert to fraction form
    66,012.68/99,012 = 18,626.60/x
  3. Step 3: Cross multiply
    66,012.68x = 99,012 × 18,626.60
  4. Step 4: Simplify right side
    66,012.68x = 1,844,256,919.20
  5. Step 5: Solve for x
    x = 1,844,256,919.20/66,012.68
  6. Step 6: Final answer
    x = 27,937.92

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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.