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Finding the Fourth Proportional to 66,132, 99,204.36 and 21,758.88

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Solution

The fourth proportional to 66,132, 99,204.36 and 21,758.88 is: 32,640.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,132 : 99,204.36 = 21,758.88 : x
  2. Step 2: Convert to fraction form
    66,132/99,204.36 = 21,758.88/x
  3. Step 3: Cross multiply
    66,132x = 99,204.36 × 21,758.88
  4. Step 4: Simplify right side
    66,132x = 2,158,575,764.72
  5. Step 5: Solve for x
    x = 2,158,575,764.72/66,132
  6. Step 6: Final answer
    x = 32,640.41

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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.