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Finding the Fourth Proportional to 72,449.36, 108,662.36 and 19,846.56

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Solution

The fourth proportional to 72,449.36, 108,662.36 and 19,846.56 is: 29,766.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,449.36 : 108,662.36 = 19,846.56 : x
  2. Step 2: Convert to fraction form
    72,449.36/108,662.36 = 19,846.56/x
  3. Step 3: Cross multiply
    72,449.36x = 108,662.36 × 19,846.56
  4. Step 4: Simplify right side
    72,449.36x = 2,156,574,047.48
  5. Step 5: Solve for x
    x = 2,156,574,047.48/72,449.36
  6. Step 6: Final answer
    x = 29,766.64

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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.