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Finding the Fourth Proportional to 66,369.72, 99,520.02 and 31,299.96

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Solution

The fourth proportional to 66,369.72, 99,520.02 and 31,299.96 is: 46,933.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,369.72 : 99,520.02 = 31,299.96 : x
  2. Step 2: Convert to fraction form
    66,369.72/99,520.02 = 31,299.96/x
  3. Step 3: Cross multiply
    66,369.72x = 99,520.02 × 31,299.96
  4. Step 4: Simplify right side
    66,369.72x = 3,114,972,645.20
  5. Step 5: Solve for x
    x = 3,114,972,645.20/66,369.72
  6. Step 6: Final answer
    x = 46,933.64

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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.