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Finding the Fourth Proportional to 66,872.70, 100,285.77 and 26,879.81

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Solution

The fourth proportional to 66,872.70, 100,285.77 and 26,879.81 is: 40,310.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,872.70 : 100,285.77 = 26,879.81 : x
  2. Step 2: Convert to fraction form
    66,872.70/100,285.77 = 26,879.81/x
  3. Step 3: Cross multiply
    66,872.70x = 100,285.77 × 26,879.81
  4. Step 4: Simplify right side
    66,872.70x = 2,695,661,941.87
  5. Step 5: Solve for x
    x = 2,695,661,941.87/66,872.70
  6. Step 6: Final answer
    x = 40,310.35

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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.