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Finding the Fourth Proportional to 57,431.01, 86,146.51 and 17,991.19

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Solution

The fourth proportional to 57,431.01, 86,146.51 and 17,991.19 is: 26,986.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,431.01 : 86,146.51 = 17,991.19 : x
  2. Step 2: Convert to fraction form
    57,431.01/86,146.51 = 17,991.19/x
  3. Step 3: Cross multiply
    57,431.01x = 86,146.51 × 17,991.19
  4. Step 4: Simplify right side
    57,431.01x = 1,549,878,229.25
  5. Step 5: Solve for x
    x = 1,549,878,229.25/57,431.01
  6. Step 6: Final answer
    x = 26,986.78

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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.