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Finding the Fourth Proportional to 72,760.64, 109,035.36 and 39,452.48

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Solution

The fourth proportional to 72,760.64, 109,035.36 and 39,452.48 is: 59,121.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,760.64 : 109,035.36 = 39,452.48 : x
  2. Step 2: Convert to fraction form
    72,760.64/109,035.36 = 39,452.48/x
  3. Step 3: Cross multiply
    72,760.64x = 109,035.36 × 39,452.48
  4. Step 4: Simplify right side
    72,760.64x = 4,301,715,359.69
  5. Step 5: Solve for x
    x = 4,301,715,359.69/72,760.64
  6. Step 6: Final answer
    x = 59,121.46

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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.