Home / 90,015.84-135,021.60-40,083.12

Finding the Fourth Proportional to 90,015.84, 135,021.60 and 40,083.12

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Solution

The fourth proportional to 90,015.84, 135,021.60 and 40,083.12 is: 60,123.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,015.84 : 135,021.60 = 40,083.12 : x
  2. Step 2: Convert to fraction form
    90,015.84/135,021.60 = 40,083.12/x
  3. Step 3: Cross multiply
    90,015.84x = 135,021.60 × 40,083.12
  4. Step 4: Simplify right side
    90,015.84x = 5,412,086,995.39
  5. Step 5: Solve for x
    x = 5,412,086,995.39/90,015.84
  6. Step 6: Final answer
    x = 60,123.72

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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.