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Finding the Fourth Proportional to 157,912.60, 217,910.08 and 86,278.36

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Solution

The fourth proportional to 157,912.60, 217,910.08 and 86,278.36 is: 119,059.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,912.60 : 217,910.08 = 86,278.36 : x
  2. Step 2: Convert to fraction form
    157,912.60/217,910.08 = 86,278.36/x
  3. Step 3: Cross multiply
    157,912.60x = 217,910.08 × 86,278.36
  4. Step 4: Simplify right side
    157,912.60x = 18,800,924,329.87
  5. Step 5: Solve for x
    x = 18,800,924,329.87/157,912.60
  6. Step 6: Final answer
    x = 119,059.05

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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.