Home / 81,831.40-122,747.11-25,680.17

Finding the Fourth Proportional to 81,831.40, 122,747.11 and 25,680.17

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Solution

The fourth proportional to 81,831.40, 122,747.11 and 25,680.17 is: 38,520.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,831.40 : 122,747.11 = 25,680.17 : x
  2. Step 2: Convert to fraction form
    81,831.40/122,747.11 = 25,680.17/x
  3. Step 3: Cross multiply
    81,831.40x = 122,747.11 × 25,680.17
  4. Step 4: Simplify right side
    81,831.40x = 3,152,166,894.48
  5. Step 5: Solve for x
    x = 3,152,166,894.48/81,831.40
  6. Step 6: Final answer
    x = 38,520.26

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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.