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Finding the Fourth Proportional to 66,390.64, 91,617.89 and 36,176.22

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Solution

The fourth proportional to 66,390.64, 91,617.89 and 36,176.22 is: 49,922.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,390.64 : 91,617.89 = 36,176.22 : x
  2. Step 2: Convert to fraction form
    66,390.64/91,617.89 = 36,176.22/x
  3. Step 3: Cross multiply
    66,390.64x = 91,617.89 × 36,176.22
  4. Step 4: Simplify right side
    66,390.64x = 3,314,389,102.85
  5. Step 5: Solve for x
    x = 3,314,389,102.85/66,390.64
  6. Step 6: Final answer
    x = 49,922.54

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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.