Home / 91,919.21-137,878.92-28,739.67

Finding the Fourth Proportional to 91,919.21, 137,878.92 and 28,739.67

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Solution

The fourth proportional to 91,919.21, 137,878.92 and 28,739.67 is: 43,109.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,919.21 : 137,878.92 = 28,739.67 : x
  2. Step 2: Convert to fraction form
    91,919.21/137,878.92 = 28,739.67/x
  3. Step 3: Cross multiply
    91,919.21x = 137,878.92 × 28,739.67
  4. Step 4: Simplify right side
    91,919.21x = 3,962,594,660.76
  5. Step 5: Solve for x
    x = 3,962,594,660.76/91,919.21
  6. Step 6: Final answer
    x = 43,109.54

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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.