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Finding the Fourth Proportional to 66,808.67, 100,221.23 and 21,828.96

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Solution

The fourth proportional to 66,808.67, 100,221.23 and 21,828.96 is: 32,746.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,808.67 : 100,221.23 = 21,828.96 : x
  2. Step 2: Convert to fraction form
    66,808.67/100,221.23 = 21,828.96/x
  3. Step 3: Cross multiply
    66,808.67x = 100,221.23 × 21,828.96
  4. Step 4: Simplify right side
    66,808.67x = 2,187,725,275.39
  5. Step 5: Solve for x
    x = 2,187,725,275.39/66,808.67
  6. Step 6: Final answer
    x = 32,746.13

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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.