Home / 81,270.74-121,911.59-31,351.25

Finding the Fourth Proportional to 81,270.74, 121,911.59 and 31,351.25

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Solution

The fourth proportional to 81,270.74, 121,911.59 and 31,351.25 is: 47,028.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,270.74 : 121,911.59 = 31,351.25 : x
  2. Step 2: Convert to fraction form
    81,270.74/121,911.59 = 31,351.25/x
  3. Step 3: Cross multiply
    81,270.74x = 121,911.59 × 31,351.25
  4. Step 4: Simplify right side
    81,270.74x = 3,822,080,735.99
  5. Step 5: Solve for x
    x = 3,822,080,735.99/81,270.74
  6. Step 6: Final answer
    x = 47,028.99

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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.