Home / 139,831.12-192,971.40-76,170.96

Finding the Fourth Proportional to 139,831.12, 192,971.40 and 76,170.96

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Solution

The fourth proportional to 139,831.12, 192,971.40 and 76,170.96 is: 105,118.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,831.12 : 192,971.40 = 76,170.96 : x
  2. Step 2: Convert to fraction form
    139,831.12/192,971.40 = 76,170.96/x
  3. Step 3: Cross multiply
    139,831.12x = 192,971.40 × 76,170.96
  4. Step 4: Simplify right side
    139,831.12x = 14,698,816,790.54
  5. Step 5: Solve for x
    x = 14,698,816,790.54/139,831.12
  6. Step 6: Final answer
    x = 105,118.35

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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.