Home / 66,939.12-92,378.88-40,086

Finding the Fourth Proportional to 66,939.12, 92,378.88 and 40,086

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Solution

The fourth proportional to 66,939.12, 92,378.88 and 40,086 is: 55,320.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,939.12 : 92,378.88 = 40,086 : x
  2. Step 2: Convert to fraction form
    66,939.12/92,378.88 = 40,086/x
  3. Step 3: Cross multiply
    66,939.12x = 92,378.88 × 40,086
  4. Step 4: Simplify right side
    66,939.12x = 3,703,099,783.68
  5. Step 5: Solve for x
    x = 3,703,099,783.68/66,939.12
  6. Step 6: Final answer
    x = 55,320.41

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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.