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Finding the Fourth Proportional to 128,638.31, 192,954.67 and 44,395.64

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Solution

The fourth proportional to 128,638.31, 192,954.67 and 44,395.64 is: 66,592.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,638.31 : 192,954.67 = 44,395.64 : x
  2. Step 2: Convert to fraction form
    128,638.31/192,954.67 = 44,395.64/x
  3. Step 3: Cross multiply
    128,638.31x = 192,954.67 × 44,395.64
  4. Step 4: Simplify right side
    128,638.31x = 8,566,346,065.64
  5. Step 5: Solve for x
    x = 8,566,346,065.64/128,638.31
  6. Step 6: Final answer
    x = 66,592.50

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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.