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Finding the Fourth Proportional to 106,972.80, 160,459.20 and 75,868.80

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Solution

The fourth proportional to 106,972.80, 160,459.20 and 75,868.80 is: 113,803.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    106,972.80 : 160,459.20 = 75,868.80 : x
  2. Step 2: Convert to fraction form
    106,972.80/160,459.20 = 75,868.80/x
  3. Step 3: Cross multiply
    106,972.80x = 160,459.20 × 75,868.80
  4. Step 4: Simplify right side
    106,972.80x = 12,173,846,952.96
  5. Step 5: Solve for x
    x = 12,173,846,952.96/106,972.80
  6. Step 6: Final answer
    x = 113,803.20

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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.