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Finding the Fourth Proportional to 108,558.92, 149,727.06 and 72,737.48

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Solution

The fourth proportional to 108,558.92, 149,727.06 and 72,737.48 is: 100,321.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,558.92 : 149,727.06 = 72,737.48 : x
  2. Step 2: Convert to fraction form
    108,558.92/149,727.06 = 72,737.48/x
  3. Step 3: Cross multiply
    108,558.92x = 149,727.06 × 72,737.48
  4. Step 4: Simplify right side
    108,558.92x = 10,890,769,032.21
  5. Step 5: Solve for x
    x = 10,890,769,032.21/108,558.92
  6. Step 6: Final answer
    x = 100,321.27

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.