Home / 81,963.89-122,913.42-39,831.48

Finding the Fourth Proportional to 81,963.89, 122,913.42 and 39,831.48

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Solution

The fourth proportional to 81,963.89, 122,913.42 and 39,831.48 is: 59,731.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,963.89 : 122,913.42 = 39,831.48 : x
  2. Step 2: Convert to fraction form
    81,963.89/122,913.42 = 39,831.48/x
  3. Step 3: Cross multiply
    81,963.89x = 122,913.42 × 39,831.48
  4. Step 4: Simplify right side
    81,963.89x = 4,895,823,430.46
  5. Step 5: Solve for x
    x = 4,895,823,430.46/81,963.89
  6. Step 6: Final answer
    x = 59,731.47

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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.