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Finding the Fourth Proportional to 67,471.20, 101,271.60 and 57,621.60

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Solution

The fourth proportional to 67,471.20, 101,271.60 and 57,621.60 is: 86,487.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,471.20 : 101,271.60 = 57,621.60 : x
  2. Step 2: Convert to fraction form
    67,471.20/101,271.60 = 57,621.60/x
  3. Step 3: Cross multiply
    67,471.20x = 101,271.60 × 57,621.60
  4. Step 4: Simplify right side
    67,471.20x = 5,835,431,626.56
  5. Step 5: Solve for x
    x = 5,835,431,626.56/67,471.20
  6. Step 6: Final answer
    x = 86,487.74

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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.