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Finding the Fourth Proportional to 66,267.72, 99,380.52 and 21,886.20

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Solution

The fourth proportional to 66,267.72, 99,380.52 and 21,886.20 is: 32,822.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,267.72 : 99,380.52 = 21,886.20 : x
  2. Step 2: Convert to fraction form
    66,267.72/99,380.52 = 21,886.20/x
  3. Step 3: Cross multiply
    66,267.72x = 99,380.52 × 21,886.20
  4. Step 4: Simplify right side
    66,267.72x = 2,175,061,936.82
  5. Step 5: Solve for x
    x = 2,175,061,936.82/66,267.72
  6. Step 6: Final answer
    x = 32,822.34

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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.