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Finding the Fourth Proportional to 220,991.50, 331,548.44 and 87,965.17

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Solution

The fourth proportional to 220,991.50, 331,548.44 and 87,965.17 is: 131,972.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,991.50 : 331,548.44 = 87,965.17 : x
  2. Step 2: Convert to fraction form
    220,991.50/331,548.44 = 87,965.17/x
  3. Step 3: Cross multiply
    220,991.50x = 331,548.44 × 87,965.17
  4. Step 4: Simplify right side
    220,991.50x = 29,164,714,887.83
  5. Step 5: Solve for x
    x = 29,164,714,887.83/220,991.50
  6. Step 6: Final answer
    x = 131,972.11

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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.