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Finding the Fourth Proportional to 72,694.64, 108,977.28 and 28,311.04

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Solution

The fourth proportional to 72,694.64, 108,977.28 and 28,311.04 is: 42,441.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,694.64 : 108,977.28 = 28,311.04 : x
  2. Step 2: Convert to fraction form
    72,694.64/108,977.28 = 28,311.04/x
  3. Step 3: Cross multiply
    72,694.64x = 108,977.28 × 28,311.04
  4. Step 4: Simplify right side
    72,694.64x = 3,085,260,133.17
  5. Step 5: Solve for x
    x = 3,085,260,133.17/72,694.64
  6. Step 6: Final answer
    x = 42,441.37

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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.