Home / 135,438.33-186,936-90,118.22

Finding the Fourth Proportional to 135,438.33, 186,936 and 90,118.22

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Solution

The fourth proportional to 135,438.33, 186,936 and 90,118.22 is: 124,383.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,438.33 : 186,936 = 90,118.22 : x
  2. Step 2: Convert to fraction form
    135,438.33/186,936 = 90,118.22/x
  3. Step 3: Cross multiply
    135,438.33x = 186,936 × 90,118.22
  4. Step 4: Simplify right side
    135,438.33x = 16,846,338,639.24
  5. Step 5: Solve for x
    x = 16,846,338,639.24/135,438.33
  6. Step 6: Final answer
    x = 124,383.83

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.