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Finding the Fourth Proportional to 66,606.82, 91,916.34 and 36,391.50

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Solution

The fourth proportional to 66,606.82, 91,916.34 and 36,391.50 is: 50,219.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,606.82 : 91,916.34 = 36,391.50 : x
  2. Step 2: Convert to fraction form
    66,606.82/91,916.34 = 36,391.50/x
  3. Step 3: Cross multiply
    66,606.82x = 91,916.34 × 36,391.50
  4. Step 4: Simplify right side
    66,606.82x = 3,344,973,027.53
  5. Step 5: Solve for x
    x = 3,344,973,027.53/66,606.82
  6. Step 6: Final answer
    x = 50,219.68

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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.