Home / 81,449.22-122,143.80-28,127.64

Finding the Fourth Proportional to 81,449.22, 122,143.80 and 28,127.64

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Solution

The fourth proportional to 81,449.22, 122,143.80 and 28,127.64 is: 42,181.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,449.22 : 122,143.80 = 28,127.64 : x
  2. Step 2: Convert to fraction form
    81,449.22/122,143.80 = 28,127.64/x
  3. Step 3: Cross multiply
    81,449.22x = 122,143.80 × 28,127.64
  4. Step 4: Simplify right side
    81,449.22x = 3,435,616,834.63
  5. Step 5: Solve for x
    x = 3,435,616,834.63/81,449.22
  6. Step 6: Final answer
    x = 42,181.09

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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.