Home / 81,232.07-121,765.05-31,292.60

Finding the Fourth Proportional to 81,232.07, 121,765.05 and 31,292.60

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Solution

The fourth proportional to 81,232.07, 121,765.05 and 31,292.60 is: 46,906.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,232.07 : 121,765.05 = 31,292.60 : x
  2. Step 2: Convert to fraction form
    81,232.07/121,765.05 = 31,292.60/x
  3. Step 3: Cross multiply
    81,232.07x = 121,765.05 × 31,292.60
  4. Step 4: Simplify right side
    81,232.07x = 3,810,344,394.80
  5. Step 5: Solve for x
    x = 3,810,344,394.80/81,232.07
  6. Step 6: Final answer
    x = 46,906.90

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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.