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Finding the Fourth Proportional to 72,321.80, 108,468.30 and 34,881.80

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Solution

The fourth proportional to 72,321.80, 108,468.30 and 34,881.80 is: 52,315.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,321.80 : 108,468.30 = 34,881.80 : x
  2. Step 2: Convert to fraction form
    72,321.80/108,468.30 = 34,881.80/x
  3. Step 3: Cross multiply
    72,321.80x = 108,468.30 × 34,881.80
  4. Step 4: Simplify right side
    72,321.80x = 3,783,569,546.94
  5. Step 5: Solve for x
    x = 3,783,569,546.94/72,321.80
  6. Step 6: Final answer
    x = 52,315.75

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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.