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Finding the Fourth Proportional to 109,997.70, 165,061.35 and 72,665.70

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Solution

The fourth proportional to 109,997.70, 165,061.35 and 72,665.70 is: 109,041.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,997.70 : 165,061.35 = 72,665.70 : x
  2. Step 2: Convert to fraction form
    109,997.70/165,061.35 = 72,665.70/x
  3. Step 3: Cross multiply
    109,997.70x = 165,061.35 × 72,665.70
  4. Step 4: Simplify right side
    109,997.70x = 11,994,298,540.70
  5. Step 5: Solve for x
    x = 11,994,298,540.70/109,997.70
  6. Step 6: Final answer
    x = 109,041.36

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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.