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Finding the Fourth Proportional to 129,168.80, 193,753.20 and 99,644.30

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Solution

The fourth proportional to 129,168.80, 193,753.20 and 99,644.30 is: 149,466.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,168.80 : 193,753.20 = 99,644.30 : x
  2. Step 2: Convert to fraction form
    129,168.80/193,753.20 = 99,644.30/x
  3. Step 3: Cross multiply
    129,168.80x = 193,753.20 × 99,644.30
  4. Step 4: Simplify right side
    129,168.80x = 19,306,401,986.76
  5. Step 5: Solve for x
    x = 19,306,401,986.76/129,168.80
  6. Step 6: Final answer
    x = 149,466.45

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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.