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Finding the Fourth Proportional to 66,481.91, 91,778.88 and 51,340.58

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Solution

The fourth proportional to 66,481.91, 91,778.88 and 51,340.58 is: 70,876.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,481.91 : 91,778.88 = 51,340.58 : x
  2. Step 2: Convert to fraction form
    66,481.91/91,778.88 = 51,340.58/x
  3. Step 3: Cross multiply
    66,481.91x = 91,778.88 × 51,340.58
  4. Step 4: Simplify right side
    66,481.91x = 4,711,980,930.95
  5. Step 5: Solve for x
    x = 4,711,980,930.95/66,481.91
  6. Step 6: Final answer
    x = 70,876.14

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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.