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Finding the Fourth Proportional to 72,576.92, 108,831.36 and 42,998.96

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Solution

The fourth proportional to 72,576.92, 108,831.36 and 42,998.96 is: 64,478.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,576.92 : 108,831.36 = 42,998.96 : x
  2. Step 2: Convert to fraction form
    72,576.92/108,831.36 = 42,998.96/x
  3. Step 3: Cross multiply
    72,576.92x = 108,831.36 × 42,998.96
  4. Step 4: Simplify right side
    72,576.92x = 4,679,635,295.39
  5. Step 5: Solve for x
    x = 4,679,635,295.39/72,576.92
  6. Step 6: Final answer
    x = 64,478.28

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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.