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Finding the Fourth Proportional to 83,056.80, 124,585.20 and 74,455.20

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Solution

The fourth proportional to 83,056.80, 124,585.20 and 74,455.20 is: 111,682.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,056.80 : 124,585.20 = 74,455.20 : x
  2. Step 2: Convert to fraction form
    83,056.80/124,585.20 = 74,455.20/x
  3. Step 3: Cross multiply
    83,056.80x = 124,585.20 × 74,455.20
  4. Step 4: Simplify right side
    83,056.80x = 9,276,015,983.04
  5. Step 5: Solve for x
    x = 9,276,015,983.04/83,056.80
  6. Step 6: Final answer
    x = 111,682.80

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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.