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Finding the Fourth Proportional to 66,399.72, 91,630.78 and 36,186.36

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Solution

The fourth proportional to 66,399.72, 91,630.78 and 36,186.36 is: 49,936.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,399.72 : 91,630.78 = 36,186.36 : x
  2. Step 2: Convert to fraction form
    66,399.72/91,630.78 = 36,186.36/x
  3. Step 3: Cross multiply
    66,399.72x = 91,630.78 × 36,186.36
  4. Step 4: Simplify right side
    66,399.72x = 3,315,784,392.16
  5. Step 5: Solve for x
    x = 3,315,784,392.16/66,399.72
  6. Step 6: Final answer
    x = 49,936.72

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1.5x scale

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.