Home / 81,269.74-121,910.09-31,350.25

Finding the Fourth Proportional to 81,269.74, 121,910.09 and 31,350.25

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Solution

The fourth proportional to 81,269.74, 121,910.09 and 31,350.25 is: 47,027.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,269.74 : 121,910.09 = 31,350.25 : x
  2. Step 2: Convert to fraction form
    81,269.74/121,910.09 = 31,350.25/x
  3. Step 3: Cross multiply
    81,269.74x = 121,910.09 × 31,350.25
  4. Step 4: Simplify right side
    81,269.74x = 3,821,911,799.02
  5. Step 5: Solve for x
    x = 3,821,911,799.02/81,269.74
  6. Step 6: Final answer
    x = 47,027.49

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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.