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Finding the Fourth Proportional to 66,200.56, 99,279.76 and 21,819.04

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Solution

The fourth proportional to 66,200.56, 99,279.76 and 21,819.04 is: 32,721.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,200.56 : 99,279.76 = 21,819.04 : x
  2. Step 2: Convert to fraction form
    66,200.56/99,279.76 = 21,819.04/x
  3. Step 3: Cross multiply
    66,200.56x = 99,279.76 × 21,819.04
  4. Step 4: Simplify right side
    66,200.56x = 2,166,189,054.63
  5. Step 5: Solve for x
    x = 2,166,189,054.63/66,200.56
  6. Step 6: Final answer
    x = 32,721.61

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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.