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Finding the Fourth Proportional to 84,817.80, 127,226.70 and 77,560.20

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Solution

The fourth proportional to 84,817.80, 127,226.70 and 77,560.20 is: 116,340.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,817.80 : 127,226.70 = 77,560.20 : x
  2. Step 2: Convert to fraction form
    84,817.80/127,226.70 = 77,560.20/x
  3. Step 3: Cross multiply
    84,817.80x = 127,226.70 × 77,560.20
  4. Step 4: Simplify right side
    84,817.80x = 9,867,728,297.34
  5. Step 5: Solve for x
    x = 9,867,728,297.34/84,817.80
  6. Step 6: Final answer
    x = 116,340.30

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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.