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Finding the Fourth Proportional to 172,416.60, 258,624.90 and 83,843.10

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Solution

The fourth proportional to 172,416.60, 258,624.90 and 83,843.10 is: 125,764.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,416.60 : 258,624.90 = 83,843.10 : x
  2. Step 2: Convert to fraction form
    172,416.60/258,624.90 = 83,843.10/x
  3. Step 3: Cross multiply
    172,416.60x = 258,624.90 × 83,843.10
  4. Step 4: Simplify right side
    172,416.60x = 21,683,913,353.19
  5. Step 5: Solve for x
    x = 21,683,913,353.19/172,416.60
  6. Step 6: Final answer
    x = 125,764.65

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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.