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Finding the Fourth Proportional to 66,141.66, 91,240.50 and 41,899.86

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Solution

The fourth proportional to 66,141.66, 91,240.50 and 41,899.86 is: 57,799.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,141.66 : 91,240.50 = 41,899.86 : x
  2. Step 2: Convert to fraction form
    66,141.66/91,240.50 = 41,899.86/x
  3. Step 3: Cross multiply
    66,141.66x = 91,240.50 × 41,899.86
  4. Step 4: Simplify right side
    66,141.66x = 3,822,964,176.33
  5. Step 5: Solve for x
    x = 3,822,964,176.33/66,141.66
  6. Step 6: Final answer
    x = 57,799.64

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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.