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Finding the Fourth Proportional to 66,200.92, 99,307.86 and 21,809.56

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Solution

The fourth proportional to 66,200.92, 99,307.86 and 21,809.56 is: 32,716.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,200.92 : 99,307.86 = 21,809.56 : x
  2. Step 2: Convert to fraction form
    66,200.92/99,307.86 = 21,809.56/x
  3. Step 3: Cross multiply
    66,200.92x = 99,307.86 × 21,809.56
  4. Step 4: Simplify right side
    66,200.92x = 2,165,860,731.14
  5. Step 5: Solve for x
    x = 2,165,860,731.14/66,200.92
  6. Step 6: Final answer
    x = 32,716.47

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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.