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Finding the Fourth Proportional to 66,399.70, 99,630.64 and 33,122.34

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Solution

The fourth proportional to 66,399.70, 99,630.64 and 33,122.34 is: 49,699.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,399.70 : 99,630.64 = 33,122.34 : x
  2. Step 2: Convert to fraction form
    66,399.70/99,630.64 = 33,122.34/x
  3. Step 3: Cross multiply
    66,399.70x = 99,630.64 × 33,122.34
  4. Step 4: Simplify right side
    66,399.70x = 3,299,999,932.50
  5. Step 5: Solve for x
    x = 3,299,999,932.50/66,399.70
  6. Step 6: Final answer
    x = 49,699.02

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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.