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Finding the Fourth Proportional to 66,606.72, 91,917.44 and 38,310.48

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Solution

The fourth proportional to 66,606.72, 91,917.44 and 38,310.48 is: 52,868.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,606.72 : 91,917.44 = 38,310.48 : x
  2. Step 2: Convert to fraction form
    66,606.72/91,917.44 = 38,310.48/x
  3. Step 3: Cross multiply
    66,606.72x = 91,917.44 × 38,310.48
  4. Step 4: Simplify right side
    66,606.72x = 3,521,401,246.77
  5. Step 5: Solve for x
    x = 3,521,401,246.77/66,606.72
  6. Step 6: Final answer
    x = 52,868.56

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.