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Finding the Fourth Proportional to 72,976.56, 100,707.75 and 39,442.56

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Solution

The fourth proportional to 72,976.56, 100,707.75 and 39,442.56 is: 54,430.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,976.56 : 100,707.75 = 39,442.56 : x
  2. Step 2: Convert to fraction form
    72,976.56/100,707.75 = 39,442.56/x
  3. Step 3: Cross multiply
    72,976.56x = 100,707.75 × 39,442.56
  4. Step 4: Simplify right side
    72,976.56x = 3,972,171,471.84
  5. Step 5: Solve for x
    x = 3,972,171,471.84/72,976.56
  6. Step 6: Final answer
    x = 54,430.79

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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.