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Finding the Fourth Proportional to 66,605.66, 91,914.74 and 36,390.33

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Solution

The fourth proportional to 66,605.66, 91,914.74 and 36,390.33 is: 50,218.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,605.66 : 91,914.74 = 36,390.33 : x
  2. Step 2: Convert to fraction form
    66,605.66/91,914.74 = 36,390.33/x
  3. Step 3: Cross multiply
    66,605.66x = 91,914.74 × 36,390.33
  4. Step 4: Simplify right side
    66,605.66x = 3,344,808,150.94
  5. Step 5: Solve for x
    x = 3,344,808,150.94/66,605.66
  6. Step 6: Final answer
    x = 50,218.08

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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.