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Finding the Fourth Proportional to 66,800.16, 100,131.12 and 25,218

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Solution

The fourth proportional to 66,800.16, 100,131.12 and 25,218 is: 37,800.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,800.16 : 100,131.12 = 25,218 : x
  2. Step 2: Convert to fraction form
    66,800.16/100,131.12 = 25,218/x
  3. Step 3: Cross multiply
    66,800.16x = 100,131.12 × 25,218
  4. Step 4: Simplify right side
    66,800.16x = 2,525,106,584.16
  5. Step 5: Solve for x
    x = 2,525,106,584.16/66,800.16
  6. Step 6: Final answer
    x = 37,800.91

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.