Home / 81,013.13-121,519.70-25,609.13

Finding the Fourth Proportional to 81,013.13, 121,519.70 and 25,609.13

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Solution

The fourth proportional to 81,013.13, 121,519.70 and 25,609.13 is: 38,413.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,013.13 : 121,519.70 = 25,609.13 : x
  2. Step 2: Convert to fraction form
    81,013.13/121,519.70 = 25,609.13/x
  3. Step 3: Cross multiply
    81,013.13x = 121,519.70 × 25,609.13
  4. Step 4: Simplify right side
    81,013.13x = 3,112,013,059.22
  5. Step 5: Solve for x
    x = 3,112,013,059.22/81,013.13
  6. Step 6: Final answer
    x = 38,413.69

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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.