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Finding the Fourth Proportional to 72,928.35, 109,410.97 and 20,337.83

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Solution

The fourth proportional to 72,928.35, 109,410.97 and 20,337.83 is: 30,511.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,928.35 : 109,410.97 = 20,337.83 : x
  2. Step 2: Convert to fraction form
    72,928.35/109,410.97 = 20,337.83/x
  3. Step 3: Cross multiply
    72,928.35x = 109,410.97 × 20,337.83
  4. Step 4: Simplify right side
    72,928.35x = 2,225,181,708.00
  5. Step 5: Solve for x
    x = 2,225,181,708.00/72,928.35
  6. Step 6: Final answer
    x = 30,511.89

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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.