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Finding the Fourth Proportional to 66,578.46, 91,845.81 and 39,712.38

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Solution

The fourth proportional to 66,578.46, 91,845.81 and 39,712.38 is: 54,783.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,578.46 : 91,845.81 = 39,712.38 : x
  2. Step 2: Convert to fraction form
    66,578.46/91,845.81 = 39,712.38/x
  3. Step 3: Cross multiply
    66,578.46x = 91,845.81 × 39,712.38
  4. Step 4: Simplify right side
    66,578.46x = 3,647,415,708.13
  5. Step 5: Solve for x
    x = 3,647,415,708.13/66,578.46
  6. Step 6: Final answer
    x = 54,783.72

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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.