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Finding the Fourth Proportional to 66,168, 91,311.84 and 36,360

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Solution

The fourth proportional to 66,168, 91,311.84 and 36,360 is: 50,176.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,168 : 91,311.84 = 36,360 : x
  2. Step 2: Convert to fraction form
    66,168/91,311.84 = 36,360/x
  3. Step 3: Cross multiply
    66,168x = 91,311.84 × 36,360
  4. Step 4: Simplify right side
    66,168x = 3,320,098,502.40
  5. Step 5: Solve for x
    x = 3,320,098,502.40/66,168
  6. Step 6: Final answer
    x = 50,176.80

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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.