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Finding the Fourth Proportional to 171,986.90, 257,862.56 and 87,583.68

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Solution

The fourth proportional to 171,986.90, 257,862.56 and 87,583.68 is: 131,315.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,986.90 : 257,862.56 = 87,583.68 : x
  2. Step 2: Convert to fraction form
    171,986.90/257,862.56 = 87,583.68/x
  3. Step 3: Cross multiply
    171,986.90x = 257,862.56 × 87,583.68
  4. Step 4: Simplify right side
    171,986.90x = 22,584,551,501.10
  5. Step 5: Solve for x
    x = 22,584,551,501.10/171,986.90
  6. Step 6: Final answer
    x = 131,315.54

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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.