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Finding the Fourth Proportional to 81,460.54, 122,205.21 and 28,900.54

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Solution

The fourth proportional to 81,460.54, 122,205.21 and 28,900.54 is: 43,355.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,460.54 : 122,205.21 = 28,900.54 : x
  2. Step 2: Convert to fraction form
    81,460.54/122,205.21 = 28,900.54/x
  3. Step 3: Cross multiply
    81,460.54x = 122,205.21 × 28,900.54
  4. Step 4: Simplify right side
    81,460.54x = 3,531,796,559.81
  5. Step 5: Solve for x
    x = 3,531,796,559.81/81,460.54
  6. Step 6: Final answer
    x = 43,355.92

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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.