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Finding the Fourth Proportional to 90,121.80, 135,161.70 and 33,967.51

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Solution

The fourth proportional to 90,121.80, 135,161.70 and 33,967.51 is: 50,943.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,121.80 : 135,161.70 = 33,967.51 : x
  2. Step 2: Convert to fraction form
    90,121.80/135,161.70 = 33,967.51/x
  3. Step 3: Cross multiply
    90,121.80x = 135,161.70 × 33,967.51
  4. Step 4: Simplify right side
    90,121.80x = 4,591,106,396.37
  5. Step 5: Solve for x
    x = 4,591,106,396.37/90,121.80
  6. Step 6: Final answer
    x = 50,943.35

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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.