Home / 81,724.52-122,831.40-67,776.32

Finding the Fourth Proportional to 81,724.52, 122,831.40 and 67,776.32

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Solution

The fourth proportional to 81,724.52, 122,831.40 and 67,776.32 is: 101,867.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,724.52 : 122,831.40 = 67,776.32 : x
  2. Step 2: Convert to fraction form
    81,724.52/122,831.40 = 67,776.32/x
  3. Step 3: Cross multiply
    81,724.52x = 122,831.40 × 67,776.32
  4. Step 4: Simplify right side
    81,724.52x = 8,325,060,272.45
  5. Step 5: Solve for x
    x = 8,325,060,272.45/81,724.52
  6. Step 6: Final answer
    x = 101,867.35

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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.