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Finding the Fourth Proportional to 72,914.52, 109,380.90 and 28,535.54

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Solution

The fourth proportional to 72,914.52, 109,380.90 and 28,535.54 is: 42,806.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,914.52 : 109,380.90 = 28,535.54 : x
  2. Step 2: Convert to fraction form
    72,914.52/109,380.90 = 28,535.54/x
  3. Step 3: Cross multiply
    72,914.52x = 109,380.90 × 28,535.54
  4. Step 4: Simplify right side
    72,914.52x = 3,121,243,047.19
  5. Step 5: Solve for x
    x = 3,121,243,047.19/72,914.52
  6. Step 6: Final answer
    x = 42,806.88

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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.