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Finding the Fourth Proportional to 72,431.55, 108,563.27 and 27,424.31

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Solution

The fourth proportional to 72,431.55, 108,563.27 and 27,424.31 is: 41,104.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,431.55 : 108,563.27 = 27,424.31 : x
  2. Step 2: Convert to fraction form
    72,431.55/108,563.27 = 27,424.31/x
  3. Step 3: Cross multiply
    72,431.55x = 108,563.27 × 27,424.31
  4. Step 4: Simplify right side
    72,431.55x = 2,977,272,091.16
  5. Step 5: Solve for x
    x = 2,977,272,091.16/72,431.55
  6. Step 6: Final answer
    x = 41,104.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.