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Finding the Fourth Proportional to 85,991.64, 128,910.51 and 33,388.62

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Solution

The fourth proportional to 85,991.64, 128,910.51 and 33,388.62 is: 50,053.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,991.64 : 128,910.51 = 33,388.62 : x
  2. Step 2: Convert to fraction form
    85,991.64/128,910.51 = 33,388.62/x
  3. Step 3: Cross multiply
    85,991.64x = 128,910.51 × 33,388.62
  4. Step 4: Simplify right side
    85,991.64x = 4,304,144,032.40
  5. Step 5: Solve for x
    x = 4,304,144,032.40/85,991.64
  6. Step 6: Final answer
    x = 50,053.05

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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.