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Finding the Fourth Proportional to 66,173.96, 91,320 and 35,959.21

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Solution

The fourth proportional to 66,173.96, 91,320 and 35,959.21 is: 49,623.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,173.96 : 91,320 = 35,959.21 : x
  2. Step 2: Convert to fraction form
    66,173.96/91,320 = 35,959.21/x
  3. Step 3: Cross multiply
    66,173.96x = 91,320 × 35,959.21
  4. Step 4: Simplify right side
    66,173.96x = 3,283,795,342.58
  5. Step 5: Solve for x
    x = 3,283,795,342.58/66,173.96
  6. Step 6: Final answer
    x = 49,623.68

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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.