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Finding the Fourth Proportional to 72,576.90, 108,837.27 and 28,197.81

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Solution

The fourth proportional to 72,576.90, 108,837.27 and 28,197.81 is: 42,285.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,576.90 : 108,837.27 = 28,197.81 : x
  2. Step 2: Convert to fraction form
    72,576.90/108,837.27 = 28,197.81/x
  3. Step 3: Cross multiply
    72,576.90x = 108,837.27 × 28,197.81
  4. Step 4: Simplify right side
    72,576.90x = 3,068,972,660.38
  5. Step 5: Solve for x
    x = 3,068,972,660.38/72,576.90
  6. Step 6: Final answer
    x = 42,285.81

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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.