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Finding the Fourth Proportional to 49,487.20, 74,230.80 and 43,343.20

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Solution

The fourth proportional to 49,487.20, 74,230.80 and 43,343.20 is: 65,014.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    49,487.20 : 74,230.80 = 43,343.20 : x
  2. Step 2: Convert to fraction form
    49,487.20/74,230.80 = 43,343.20/x
  3. Step 3: Cross multiply
    49,487.20x = 74,230.80 × 43,343.20
  4. Step 4: Simplify right side
    49,487.20x = 3,217,400,410.56
  5. Step 5: Solve for x
    x = 3,217,400,410.56/49,487.20
  6. Step 6: Final answer
    x = 65,014.80

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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.