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Finding the Fourth Proportional to 66,157.86, 91,305.72 and 37,872.66

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Solution

The fourth proportional to 66,157.86, 91,305.72 and 37,872.66 is: 52,268.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,157.86 : 91,305.72 = 37,872.66 : x
  2. Step 2: Convert to fraction form
    66,157.86/91,305.72 = 37,872.66/x
  3. Step 3: Cross multiply
    66,157.86x = 91,305.72 × 37,872.66
  4. Step 4: Simplify right side
    66,157.86x = 3,457,990,489.62
  5. Step 5: Solve for x
    x = 3,457,990,489.62/66,157.86
  6. Step 6: Final answer
    x = 52,268.78

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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.