Home / 81,013.36-121,519.32-25,609.36

Finding the Fourth Proportional to 81,013.36, 121,519.32 and 25,609.36

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Solution

The fourth proportional to 81,013.36, 121,519.32 and 25,609.36 is: 38,413.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,013.36 : 121,519.32 = 25,609.36 : x
  2. Step 2: Convert to fraction form
    81,013.36/121,519.32 = 25,609.36/x
  3. Step 3: Cross multiply
    81,013.36x = 121,519.32 × 25,609.36
  4. Step 4: Simplify right side
    81,013.36x = 3,112,032,012.84
  5. Step 5: Solve for x
    x = 3,112,032,012.84/81,013.36
  6. Step 6: Final answer
    x = 38,413.81

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1.5x scale

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.