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Finding the Fourth Proportional to 66,605.74, 91,913.07 and 36,390.58

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Solution

The fourth proportional to 66,605.74, 91,913.07 and 36,390.58 is: 50,217.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,605.74 : 91,913.07 = 36,390.58 : x
  2. Step 2: Convert to fraction form
    66,605.74/91,913.07 = 36,390.58/x
  3. Step 3: Cross multiply
    66,605.74x = 91,913.07 × 36,390.58
  4. Step 4: Simplify right side
    66,605.74x = 3,344,769,926.88
  5. Step 5: Solve for x
    x = 3,344,769,926.88/66,605.74
  6. Step 6: Final answer
    x = 50,217.44

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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.