Home / 91,107.12-136,676.72-31,121.49

Finding the Fourth Proportional to 91,107.12, 136,676.72 and 31,121.49

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Solution

The fourth proportional to 91,107.12, 136,676.72 and 31,121.49 is: 46,687.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,107.12 : 136,676.72 = 31,121.49 : x
  2. Step 2: Convert to fraction form
    91,107.12/136,676.72 = 31,121.49/x
  3. Step 3: Cross multiply
    91,107.12x = 136,676.72 × 31,121.49
  4. Step 4: Simplify right side
    91,107.12x = 4,253,583,019.11
  5. Step 5: Solve for x
    x = 4,253,583,019.11/91,107.12
  6. Step 6: Final answer
    x = 46,687.71

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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.