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Finding the Fourth Proportional to 157,930.80, 217,944.60 and 86,310.84

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Solution

The fourth proportional to 157,930.80, 217,944.60 and 86,310.84 is: 119,109.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,930.80 : 217,944.60 = 86,310.84 : x
  2. Step 2: Convert to fraction form
    157,930.80/217,944.60 = 86,310.84/x
  3. Step 3: Cross multiply
    157,930.80x = 217,944.60 × 86,310.84
  4. Step 4: Simplify right side
    157,930.80x = 18,810,981,499.46
  5. Step 5: Solve for x
    x = 18,810,981,499.46/157,930.80
  6. Step 6: Final answer
    x = 119,109.01

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.