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Finding the Fourth Proportional to 81,605.88, 112,617.14 and 49,777.74

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Solution

The fourth proportional to 81,605.88, 112,617.14 and 49,777.74 is: 68,693.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,605.88 : 112,617.14 = 49,777.74 : x
  2. Step 2: Convert to fraction form
    81,605.88/112,617.14 = 49,777.74/x
  3. Step 3: Cross multiply
    81,605.88x = 112,617.14 × 49,777.74
  4. Step 4: Simplify right side
    81,605.88x = 5,605,826,465.57
  5. Step 5: Solve for x
    x = 5,605,826,465.57/81,605.88
  6. Step 6: Final answer
    x = 68,693.90

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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.