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Finding the Fourth Proportional to 109,996.20, 165,059.10 and 72,664.20

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Solution

The fourth proportional to 109,996.20, 165,059.10 and 72,664.20 is: 109,039.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,996.20 : 165,059.10 = 72,664.20 : x
  2. Step 2: Convert to fraction form
    109,996.20/165,059.10 = 72,664.20/x
  3. Step 3: Cross multiply
    109,996.20x = 165,059.10 × 72,664.20
  4. Step 4: Simplify right side
    109,996.20x = 11,993,887,454.22
  5. Step 5: Solve for x
    x = 11,993,887,454.22/109,996.20
  6. Step 6: Final answer
    x = 109,039.11

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1.5x scale

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.