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Finding the Fourth Proportional to 66,281.22, 99,400.77 and 21,899.70

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Solution

The fourth proportional to 66,281.22, 99,400.77 and 21,899.70 is: 32,842.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,281.22 : 99,400.77 = 21,899.70 : x
  2. Step 2: Convert to fraction form
    66,281.22/99,400.77 = 21,899.70/x
  3. Step 3: Cross multiply
    66,281.22x = 99,400.77 × 21,899.70
  4. Step 4: Simplify right side
    66,281.22x = 2,176,847,042.77
  5. Step 5: Solve for x
    x = 2,176,847,042.77/66,281.22
  6. Step 6: Final answer
    x = 32,842.59

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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.