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Finding the Fourth Proportional to 91,911.57, 126,837.79 and 53,697.39

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Solution

The fourth proportional to 91,911.57, 126,837.79 and 53,697.39 is: 74,102.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,911.57 : 126,837.79 = 53,697.39 : x
  2. Step 2: Convert to fraction form
    91,911.57/126,837.79 = 53,697.39/x
  3. Step 3: Cross multiply
    91,911.57x = 126,837.79 × 53,697.39
  4. Step 4: Simplify right side
    91,911.57x = 6,810,858,276.37
  5. Step 5: Solve for x
    x = 6,810,858,276.37/91,911.57
  6. Step 6: Final answer
    x = 74,102.30

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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.