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Finding the Fourth Proportional to 104,642.20, 156,963.30 and 73,149.40

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Solution

The fourth proportional to 104,642.20, 156,963.30 and 73,149.40 is: 109,724.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,642.20 : 156,963.30 = 73,149.40 : x
  2. Step 2: Convert to fraction form
    104,642.20/156,963.30 = 73,149.40/x
  3. Step 3: Cross multiply
    104,642.20x = 156,963.30 × 73,149.40
  4. Step 4: Simplify right side
    104,642.20x = 11,481,771,217.02
  5. Step 5: Solve for x
    x = 11,481,771,217.02/104,642.20
  6. Step 6: Final answer
    x = 109,724.10

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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.