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Finding the Fourth Proportional to 66,391.94, 91,619.70 and 36,177.48

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Solution

The fourth proportional to 66,391.94, 91,619.70 and 36,177.48 is: 49,924.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,391.94 : 91,619.70 = 36,177.48 : x
  2. Step 2: Convert to fraction form
    66,391.94/91,619.70 = 36,177.48/x
  3. Step 3: Cross multiply
    66,391.94x = 91,619.70 × 36,177.48
  4. Step 4: Simplify right side
    66,391.94x = 3,314,569,864.36
  5. Step 5: Solve for x
    x = 3,314,569,864.36/66,391.94
  6. Step 6: Final answer
    x = 49,924.28

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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.