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Finding the Fourth Proportional to 109,998.20, 165,062.10 and 72,666.20

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Solution

The fourth proportional to 109,998.20, 165,062.10 and 72,666.20 is: 109,042.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,998.20 : 165,062.10 = 72,666.20 : x
  2. Step 2: Convert to fraction form
    109,998.20/165,062.10 = 72,666.20/x
  3. Step 3: Cross multiply
    109,998.20x = 165,062.10 × 72,666.20
  4. Step 4: Simplify right side
    109,998.20x = 11,994,435,571.02
  5. Step 5: Solve for x
    x = 11,994,435,571.02/109,998.20
  6. Step 6: Final answer
    x = 109,042.11

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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.