Home / 81,582.45-122,359.08-51,912.15

Finding the Fourth Proportional to 81,582.45, 122,359.08 and 51,912.15

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Solution

The fourth proportional to 81,582.45, 122,359.08 and 51,912.15 is: 77,858.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,582.45 : 122,359.08 = 51,912.15 : x
  2. Step 2: Convert to fraction form
    81,582.45/122,359.08 = 51,912.15/x
  3. Step 3: Cross multiply
    81,582.45x = 122,359.08 × 51,912.15
  4. Step 4: Simplify right side
    81,582.45x = 6,351,922,914.82
  5. Step 5: Solve for x
    x = 6,351,922,914.82/81,582.45
  6. Step 6: Final answer
    x = 77,858.94

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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.