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Finding the Fourth Proportional to 66,831, 92,226.78 and 39,974.64

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Solution

The fourth proportional to 66,831, 92,226.78 and 39,974.64 is: 55,165.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,831 : 92,226.78 = 39,974.64 : x
  2. Step 2: Convert to fraction form
    66,831/92,226.78 = 39,974.64/x
  3. Step 3: Cross multiply
    66,831x = 92,226.78 × 39,974.64
  4. Step 4: Simplify right side
    66,831x = 3,686,732,328.86
  5. Step 5: Solve for x
    x = 3,686,732,328.86/66,831
  6. Step 6: Final answer
    x = 55,165.00

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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.