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Finding the Fourth Proportional to 72,576.86, 108,865.16 and 47,610.96

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Solution

The fourth proportional to 72,576.86, 108,865.16 and 47,610.96 is: 71,416.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,576.86 : 108,865.16 = 47,610.96 : x
  2. Step 2: Convert to fraction form
    72,576.86/108,865.16 = 47,610.96/x
  3. Step 3: Cross multiply
    72,576.86x = 108,865.16 × 47,610.96
  4. Step 4: Simplify right side
    72,576.86x = 5,183,174,540.10
  5. Step 5: Solve for x
    x = 5,183,174,540.10/72,576.86
  6. Step 6: Final answer
    x = 71,416.36

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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.