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Finding the Fourth Proportional to 66,615.74, 91,930.78 and 39,773.96

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Solution

The fourth proportional to 66,615.74, 91,930.78 and 39,773.96 is: 54,888.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,615.74 : 91,930.78 = 39,773.96 : x
  2. Step 2: Convert to fraction form
    66,615.74/91,930.78 = 39,773.96/x
  3. Step 3: Cross multiply
    66,615.74x = 91,930.78 × 39,773.96
  4. Step 4: Simplify right side
    66,615.74x = 3,656,451,166.49
  5. Step 5: Solve for x
    x = 3,656,451,166.49/66,615.74
  6. Step 6: Final answer
    x = 54,888.70

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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.