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Finding the Fourth Proportional to 66,879.80, 100,305.30 and 29,439.80

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Solution

The fourth proportional to 66,879.80, 100,305.30 and 29,439.80 is: 44,153.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,879.80 : 100,305.30 = 29,439.80 : x
  2. Step 2: Convert to fraction form
    66,879.80/100,305.30 = 29,439.80/x
  3. Step 3: Cross multiply
    66,879.80x = 100,305.30 × 29,439.80
  4. Step 4: Simplify right side
    66,879.80x = 2,952,967,970.94
  5. Step 5: Solve for x
    x = 2,952,967,970.94/66,879.80
  6. Step 6: Final answer
    x = 44,153.36

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1.5x scale

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.