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Finding the Fourth Proportional to 66,170.91, 99,270.07 and 21,800.39

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Solution

The fourth proportional to 66,170.91, 99,270.07 and 21,800.39 is: 32,705.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,170.91 : 99,270.07 = 21,800.39 : x
  2. Step 2: Convert to fraction form
    66,170.91/99,270.07 = 21,800.39/x
  3. Step 3: Cross multiply
    66,170.91x = 99,270.07 × 21,800.39
  4. Step 4: Simplify right side
    66,170.91x = 2,164,126,132.33
  5. Step 5: Solve for x
    x = 2,164,126,132.33/66,170.91
  6. Step 6: Final answer
    x = 32,705.10

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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.