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Finding the Fourth Proportional to 72,763.72, 109,187.50 and 30,640.52

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Solution

The fourth proportional to 72,763.72, 109,187.50 and 30,640.52 is: 45,978.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,763.72 : 109,187.50 = 30,640.52 : x
  2. Step 2: Convert to fraction form
    72,763.72/109,187.50 = 30,640.52/x
  3. Step 3: Cross multiply
    72,763.72x = 109,187.50 × 30,640.52
  4. Step 4: Simplify right side
    72,763.72x = 3,345,561,777.50
  5. Step 5: Solve for x
    x = 3,345,561,777.50/72,763.72
  6. Step 6: Final answer
    x = 45,978.43

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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.