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Finding the Fourth Proportional to 91,190.79, 125,845.41 and 57,200.70

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Solution

The fourth proportional to 91,190.79, 125,845.41 and 57,200.70 is: 78,938.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,190.79 : 125,845.41 = 57,200.70 : x
  2. Step 2: Convert to fraction form
    91,190.79/125,845.41 = 57,200.70/x
  3. Step 3: Cross multiply
    91,190.79x = 125,845.41 × 57,200.70
  4. Step 4: Simplify right side
    91,190.79x = 7,198,445,543.79
  5. Step 5: Solve for x
    x = 7,198,445,543.79/91,190.79
  6. Step 6: Final answer
    x = 78,938.30

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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.