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Finding the Fourth Proportional to 171,500.76, 257,338.96 and 81,645.13

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Solution

The fourth proportional to 171,500.76, 257,338.96 and 81,645.13 is: 122,509.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,500.76 : 257,338.96 = 81,645.13 : x
  2. Step 2: Convert to fraction form
    171,500.76/257,338.96 = 81,645.13/x
  3. Step 3: Cross multiply
    171,500.76x = 257,338.96 × 81,645.13
  4. Step 4: Simplify right side
    171,500.76x = 21,010,472,843.26
  5. Step 5: Solve for x
    x = 21,010,472,843.26/171,500.76
  6. Step 6: Final answer
    x = 122,509.50

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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.