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Finding the Fourth Proportional to 72,391.91, 108,560.53 and 34,939.54

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Solution

The fourth proportional to 72,391.91, 108,560.53 and 34,939.54 is: 52,396.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,391.91 : 108,560.53 = 34,939.54 : x
  2. Step 2: Convert to fraction form
    72,391.91/108,560.53 = 34,939.54/x
  3. Step 3: Cross multiply
    72,391.91x = 108,560.53 × 34,939.54
  4. Step 4: Simplify right side
    72,391.91x = 3,793,054,980.36
  5. Step 5: Solve for x
    x = 3,793,054,980.36/72,391.91
  6. Step 6: Final answer
    x = 52,396.12

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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.