Home / 70,811.82-106,191-20,877.75

Finding the Fourth Proportional to 70,811.82, 106,191 and 20,877.75

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Solution

The fourth proportional to 70,811.82, 106,191 and 20,877.75 is: 31,308.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,811.82 : 106,191 = 20,877.75 : x
  2. Step 2: Convert to fraction form
    70,811.82/106,191 = 20,877.75/x
  3. Step 3: Cross multiply
    70,811.82x = 106,191 × 20,877.75
  4. Step 4: Simplify right side
    70,811.82x = 2,217,029,150.25
  5. Step 5: Solve for x
    x = 2,217,029,150.25/70,811.82
  6. Step 6: Final answer
    x = 31,308.74

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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.