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Finding the Fourth Proportional to 71,761.44, 99,030.79 and 39,932.39

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Solution

The fourth proportional to 71,761.44, 99,030.79 and 39,932.39 is: 55,106.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,761.44 : 99,030.79 = 39,932.39 : x
  2. Step 2: Convert to fraction form
    71,761.44/99,030.79 = 39,932.39/x
  3. Step 3: Cross multiply
    71,761.44x = 99,030.79 × 39,932.39
  4. Step 4: Simplify right side
    71,761.44x = 3,954,535,433.47
  5. Step 5: Solve for x
    x = 3,954,535,433.47/71,761.44
  6. Step 6: Final answer
    x = 55,106.69

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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.