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Finding the Fourth Proportional to 66,979, 92,431.38 and 41,843.08

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Solution

The fourth proportional to 66,979, 92,431.38 and 41,843.08 is: 57,743.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,979 : 92,431.38 = 41,843.08 : x
  2. Step 2: Convert to fraction form
    66,979/92,431.38 = 41,843.08/x
  3. Step 3: Cross multiply
    66,979x = 92,431.38 × 41,843.08
  4. Step 4: Simplify right side
    66,979x = 3,867,613,627.85
  5. Step 5: Solve for x
    x = 3,867,613,627.85/66,979
  6. Step 6: Final answer
    x = 57,743.68

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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.