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Finding the Fourth Proportional to 72,279.54, 108,360.86 and 30,191.86

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Solution

The fourth proportional to 72,279.54, 108,360.86 and 30,191.86 is: 45,263.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,279.54 : 108,360.86 = 30,191.86 : x
  2. Step 2: Convert to fraction form
    72,279.54/108,360.86 = 30,191.86/x
  3. Step 3: Cross multiply
    72,279.54x = 108,360.86 × 30,191.86
  4. Step 4: Simplify right side
    72,279.54x = 3,271,615,289.56
  5. Step 5: Solve for x
    x = 3,271,615,289.56/72,279.54
  6. Step 6: Final answer
    x = 45,263.37

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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.