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Finding the Fourth Proportional to 66,728.72, 92,086.80 and 36,516.72

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Solution

The fourth proportional to 66,728.72, 92,086.80 and 36,516.72 is: 50,393.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,728.72 : 92,086.80 = 36,516.72 : x
  2. Step 2: Convert to fraction form
    66,728.72/92,086.80 = 36,516.72/x
  3. Step 3: Cross multiply
    66,728.72x = 92,086.80 × 36,516.72
  4. Step 4: Simplify right side
    66,728.72x = 3,362,707,891.30
  5. Step 5: Solve for x
    x = 3,362,707,891.30/66,728.72
  6. Step 6: Final answer
    x = 50,393.71

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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.