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Finding the Fourth Proportional to 72,187.88, 108,232.54 and 38,458.94

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Solution

The fourth proportional to 72,187.88, 108,232.54 and 38,458.94 is: 57,662.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,187.88 : 108,232.54 = 38,458.94 : x
  2. Step 2: Convert to fraction form
    72,187.88/108,232.54 = 38,458.94/x
  3. Step 3: Cross multiply
    72,187.88x = 108,232.54 × 38,458.94
  4. Step 4: Simplify right side
    72,187.88x = 4,162,508,761.91
  5. Step 5: Solve for x
    x = 4,162,508,761.91/72,187.88
  6. Step 6: Final answer
    x = 57,662.16

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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.