Home / 81,290.92-121,948.01-25,135.38

Finding the Fourth Proportional to 81,290.92, 121,948.01 and 25,135.38

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Solution

The fourth proportional to 81,290.92, 121,948.01 and 25,135.38 is: 37,706.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,290.92 : 121,948.01 = 25,135.38 : x
  2. Step 2: Convert to fraction form
    81,290.92/121,948.01 = 25,135.38/x
  3. Step 3: Cross multiply
    81,290.92x = 121,948.01 × 25,135.38
  4. Step 4: Simplify right side
    81,290.92x = 3,065,209,571.59
  5. Step 5: Solve for x
    x = 3,065,209,571.59/81,290.92
  6. Step 6: Final answer
    x = 37,706.67

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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.