Home / 139,831.58-192,961.35-81,693.71

Finding the Fourth Proportional to 139,831.58, 192,961.35 and 81,693.71

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Solution

The fourth proportional to 139,831.58, 192,961.35 and 81,693.71 is: 112,733.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,831.58 : 192,961.35 = 81,693.71 : x
  2. Step 2: Convert to fraction form
    139,831.58/192,961.35 = 81,693.71/x
  3. Step 3: Cross multiply
    139,831.58x = 192,961.35 × 81,693.71
  4. Step 4: Simplify right side
    139,831.58x = 15,763,728,676.01
  5. Step 5: Solve for x
    x = 15,763,728,676.01/139,831.58
  6. Step 6: Final answer
    x = 112,733.68

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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.