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Finding the Fourth Proportional to 57,720.60, 86,583.60 and 18,280.80

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Solution

The fourth proportional to 57,720.60, 86,583.60 and 18,280.80 is: 27,422.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,720.60 : 86,583.60 = 18,280.80 : x
  2. Step 2: Convert to fraction form
    57,720.60/86,583.60 = 18,280.80/x
  3. Step 3: Cross multiply
    57,720.60x = 86,583.60 × 18,280.80
  4. Step 4: Simplify right side
    57,720.60x = 1,582,817,474.88
  5. Step 5: Solve for x
    x = 1,582,817,474.88/57,720.60
  6. Step 6: Final answer
    x = 27,422.06

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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.