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Finding the Fourth Proportional to 81,496.80, 112,296.96 and 65,517.12

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Solution

The fourth proportional to 81,496.80, 112,296.96 and 65,517.12 is: 90,278.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,496.80 : 112,296.96 = 65,517.12 : x
  2. Step 2: Convert to fraction form
    81,496.80/112,296.96 = 65,517.12/x
  3. Step 3: Cross multiply
    81,496.80x = 112,296.96 × 65,517.12
  4. Step 4: Simplify right side
    81,496.80x = 7,357,373,403.96
  5. Step 5: Solve for x
    x = 7,357,373,403.96/81,496.80
  6. Step 6: Final answer
    x = 90,278.06

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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.