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Finding the Fourth Proportional to 157,391.75, 217,200.65 and 85,771.79

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Solution

The fourth proportional to 157,391.75, 217,200.65 and 85,771.79 is: 118,365.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,391.75 : 217,200.65 = 85,771.79 : x
  2. Step 2: Convert to fraction form
    157,391.75/217,200.65 = 85,771.79/x
  3. Step 3: Cross multiply
    157,391.75x = 217,200.65 × 85,771.79
  4. Step 4: Simplify right side
    157,391.75x = 18,629,688,539.66
  5. Step 5: Solve for x
    x = 18,629,688,539.66/157,391.75
  6. Step 6: Final answer
    x = 118,365.09

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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.