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Finding the Fourth Proportional to 72,939.54, 100,559.09 and 54,712.79

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Solution

The fourth proportional to 72,939.54, 100,559.09 and 54,712.79 is: 75,430.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,939.54 : 100,559.09 = 54,712.79 : x
  2. Step 2: Convert to fraction form
    72,939.54/100,559.09 = 54,712.79/x
  3. Step 3: Cross multiply
    72,939.54x = 100,559.09 × 54,712.79
  4. Step 4: Simplify right side
    72,939.54x = 5,501,867,974.50
  5. Step 5: Solve for x
    x = 5,501,867,974.50/72,939.54
  6. Step 6: Final answer
    x = 75,430.52

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1.5x scale

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.