Home / 81,065.44-121,603.97-31,145.54

Finding the Fourth Proportional to 81,065.44, 121,603.97 and 31,145.54

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Solution

The fourth proportional to 81,065.44, 121,603.97 and 31,145.54 is: 46,720.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,065.44 : 121,603.97 = 31,145.54 : x
  2. Step 2: Convert to fraction form
    81,065.44/121,603.97 = 31,145.54/x
  3. Step 3: Cross multiply
    81,065.44x = 121,603.97 × 31,145.54
  4. Step 4: Simplify right side
    81,065.44x = 3,787,421,311.79
  5. Step 5: Solve for x
    x = 3,787,421,311.79/81,065.44
  6. Step 6: Final answer
    x = 46,720.54

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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.