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Finding the Fourth Proportional to 66,193.66, 99,285.09 and 21,819.70

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Solution

The fourth proportional to 66,193.66, 99,285.09 and 21,819.70 is: 32,727.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,193.66 : 99,285.09 = 21,819.70 : x
  2. Step 2: Convert to fraction form
    66,193.66/99,285.09 = 21,819.70/x
  3. Step 3: Cross multiply
    66,193.66x = 99,285.09 × 21,819.70
  4. Step 4: Simplify right side
    66,193.66x = 2,166,370,878.27
  5. Step 5: Solve for x
    x = 2,166,370,878.27/66,193.66
  6. Step 6: Final answer
    x = 32,727.77

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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.