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Finding the Fourth Proportional to 90,147.94, 135,241.90 and 33,988.54

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Solution

The fourth proportional to 90,147.94, 135,241.90 and 33,988.54 is: 50,990.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,147.94 : 135,241.90 = 33,988.54 : x
  2. Step 2: Convert to fraction form
    90,147.94/135,241.90 = 33,988.54/x
  3. Step 3: Cross multiply
    90,147.94x = 135,241.90 × 33,988.54
  4. Step 4: Simplify right side
    90,147.94x = 4,596,674,727.83
  5. Step 5: Solve for x
    x = 4,596,674,727.83/90,147.94
  6. Step 6: Final answer
    x = 50,990.35

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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.