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Finding the Fourth Proportional to 72,472.60, 108,660.30 and 33,009.40

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Solution

The fourth proportional to 72,472.60, 108,660.30 and 33,009.40 is: 49,491.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,472.60 : 108,660.30 = 33,009.40 : x
  2. Step 2: Convert to fraction form
    72,472.60/108,660.30 = 33,009.40/x
  3. Step 3: Cross multiply
    72,472.60x = 108,660.30 × 33,009.40
  4. Step 4: Simplify right side
    72,472.60x = 3,586,811,306.82
  5. Step 5: Solve for x
    x = 3,586,811,306.82/72,472.60
  6. Step 6: Final answer
    x = 49,491.96

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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.