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Finding the Fourth Proportional to 73,276.40, 109,932.60 and 20,685.20

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Solution

The fourth proportional to 73,276.40, 109,932.60 and 20,685.20 is: 31,032.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,276.40 : 109,932.60 = 20,685.20 : x
  2. Step 2: Convert to fraction form
    73,276.40/109,932.60 = 20,685.20/x
  3. Step 3: Cross multiply
    73,276.40x = 109,932.60 × 20,685.20
  4. Step 4: Simplify right side
    73,276.40x = 2,273,977,817.52
  5. Step 5: Solve for x
    x = 2,273,977,817.52/73,276.40
  6. Step 6: Final answer
    x = 31,032.88

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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.