Home / 215,101.58-322,645.08-81,977

Finding the Fourth Proportional to 215,101.58, 322,645.08 and 81,977

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Solution

The fourth proportional to 215,101.58, 322,645.08 and 81,977 is: 122,962.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,101.58 : 322,645.08 = 81,977 : x
  2. Step 2: Convert to fraction form
    215,101.58/322,645.08 = 81,977/x
  3. Step 3: Cross multiply
    215,101.58x = 322,645.08 × 81,977
  4. Step 4: Simplify right side
    215,101.58x = 26,449,475,723.16
  5. Step 5: Solve for x
    x = 26,449,475,723.16/215,101.58
  6. Step 6: Final answer
    x = 122,962.72

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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.