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Finding the Fourth Proportional to 66,650.67, 91,986.03 and 38,355.75

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Solution

The fourth proportional to 66,650.67, 91,986.03 and 38,355.75 is: 52,935.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,650.67 : 91,986.03 = 38,355.75 : x
  2. Step 2: Convert to fraction form
    66,650.67/91,986.03 = 38,355.75/x
  3. Step 3: Cross multiply
    66,650.67x = 91,986.03 × 38,355.75
  4. Step 4: Simplify right side
    66,650.67x = 3,528,193,170.17
  5. Step 5: Solve for x
    x = 3,528,193,170.17/66,650.67
  6. Step 6: Final answer
    x = 52,935.60

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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.