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Finding the Fourth Proportional to 71,661.82, 98,896.67 and 39,831.25

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Solution

The fourth proportional to 71,661.82, 98,896.67 and 39,831.25 is: 54,968.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,661.82 : 98,896.67 = 39,831.25 : x
  2. Step 2: Convert to fraction form
    71,661.82/98,896.67 = 39,831.25/x
  3. Step 3: Cross multiply
    71,661.82x = 98,896.67 × 39,831.25
  4. Step 4: Simplify right side
    71,661.82x = 3,939,177,986.94
  5. Step 5: Solve for x
    x = 3,939,177,986.94/71,661.82
  6. Step 6: Final answer
    x = 54,968.99

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.