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Finding the Fourth Proportional to 215,078.58, 322,610.58 and 81,954.06

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Solution

The fourth proportional to 215,078.58, 322,610.58 and 81,954.06 is: 122,928.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,078.58 : 322,610.58 = 81,954.06 : x
  2. Step 2: Convert to fraction form
    215,078.58/322,610.58 = 81,954.06/x
  3. Step 3: Cross multiply
    215,078.58x = 322,610.58 × 81,954.06
  4. Step 4: Simplify right side
    215,078.58x = 26,439,246,829.95
  5. Step 5: Solve for x
    x = 26,439,246,829.95/215,078.58
  6. Step 6: Final answer
    x = 122,928.31

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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.