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Finding the Fourth Proportional to 90,052.80, 135,079.20 and 33,905.51

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Solution

The fourth proportional to 90,052.80, 135,079.20 and 33,905.51 is: 50,858.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,052.80 : 135,079.20 = 33,905.51 : x
  2. Step 2: Convert to fraction form
    90,052.80/135,079.20 = 33,905.51/x
  3. Step 3: Cross multiply
    90,052.80x = 135,079.20 × 33,905.51
  4. Step 4: Simplify right side
    90,052.80x = 4,579,928,665.31
  5. Step 5: Solve for x
    x = 4,579,928,665.31/90,052.80
  6. Step 6: Final answer
    x = 50,858.26

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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.