Home / 208,187.23-312,145.52-81,839.84

Finding the Fourth Proportional to 208,187.23, 312,145.52 and 81,839.84

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Solution

The fourth proportional to 208,187.23, 312,145.52 and 81,839.84 is: 122,706.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,187.23 : 312,145.52 = 81,839.84 : x
  2. Step 2: Convert to fraction form
    208,187.23/312,145.52 = 81,839.84/x
  3. Step 3: Cross multiply
    208,187.23x = 312,145.52 × 81,839.84
  4. Step 4: Simplify right side
    208,187.23x = 25,545,939,413.52
  5. Step 5: Solve for x
    x = 25,545,939,413.52/208,187.23
  6. Step 6: Final answer
    x = 122,706.56

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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.