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Finding the Fourth Proportional to 57,718.70, 86,586.15 and 18,271.70

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Solution

The fourth proportional to 57,718.70, 86,586.15 and 18,271.70 is: 27,410.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,718.70 : 86,586.15 = 18,271.70 : x
  2. Step 2: Convert to fraction form
    57,718.70/86,586.15 = 18,271.70/x
  3. Step 3: Cross multiply
    57,718.70x = 86,586.15 × 18,271.70
  4. Step 4: Simplify right side
    57,718.70x = 1,582,076,156.96
  5. Step 5: Solve for x
    x = 1,582,076,156.96/57,718.70
  6. Step 6: Final answer
    x = 27,410.11

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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.