Home / 81,305.09-121,831.21-56,393.81

Finding the Fourth Proportional to 81,305.09, 121,831.21 and 56,393.81

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Solution

The fourth proportional to 81,305.09, 121,831.21 and 56,393.81 is: 84,503.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,305.09 : 121,831.21 = 56,393.81 : x
  2. Step 2: Convert to fraction form
    81,305.09/121,831.21 = 56,393.81/x
  3. Step 3: Cross multiply
    81,305.09x = 121,831.21 × 56,393.81
  4. Step 4: Simplify right side
    81,305.09x = 6,870,526,413.39
  5. Step 5: Solve for x
    x = 6,870,526,413.39/81,305.09
  6. Step 6: Final answer
    x = 84,503.03

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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.