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Finding the Fourth Proportional to 66,479.56, 91,739.54 and 39,608.18

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Solution

The fourth proportional to 66,479.56, 91,739.54 and 39,608.18 is: 54,657.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,479.56 : 91,739.54 = 39,608.18 : x
  2. Step 2: Convert to fraction form
    66,479.56/91,739.54 = 39,608.18/x
  3. Step 3: Cross multiply
    66,479.56x = 91,739.54 × 39,608.18
  4. Step 4: Simplify right side
    66,479.56x = 3,633,636,213.44
  5. Step 5: Solve for x
    x = 3,633,636,213.44/66,479.56
  6. Step 6: Final answer
    x = 54,657.95

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1.5x scale

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.