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Finding the Fourth Proportional to 66,880.12, 100,360.94 and 26,891.61

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Solution

The fourth proportional to 66,880.12, 100,360.94 and 26,891.61 is: 40,353.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,880.12 : 100,360.94 = 26,891.61 : x
  2. Step 2: Convert to fraction form
    66,880.12/100,360.94 = 26,891.61/x
  3. Step 3: Cross multiply
    66,880.12x = 100,360.94 × 26,891.61
  4. Step 4: Simplify right side
    66,880.12x = 2,698,867,074.04
  5. Step 5: Solve for x
    x = 2,698,867,074.04/66,880.12
  6. Step 6: Final answer
    x = 40,353.80

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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.