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Finding the Fourth Proportional to 114,644.20, 171,966.30 and 86,650.60

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Solution

The fourth proportional to 114,644.20, 171,966.30 and 86,650.60 is: 129,975.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    114,644.20 : 171,966.30 = 86,650.60 : x
  2. Step 2: Convert to fraction form
    114,644.20/171,966.30 = 86,650.60/x
  3. Step 3: Cross multiply
    114,644.20x = 171,966.30 × 86,650.60
  4. Step 4: Simplify right side
    114,644.20x = 14,900,983,074.78
  5. Step 5: Solve for x
    x = 14,900,983,074.78/114,644.20
  6. Step 6: Final answer
    x = 129,975.90

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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.