Home / 77,181.20-115,773.83-21,021.79

Finding the Fourth Proportional to 77,181.20, 115,773.83 and 21,021.79

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Solution

The fourth proportional to 77,181.20, 115,773.83 and 21,021.79 is: 31,533.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,181.20 : 115,773.83 = 21,021.79 : x
  2. Step 2: Convert to fraction form
    77,181.20/115,773.83 = 21,021.79/x
  3. Step 3: Cross multiply
    77,181.20x = 115,773.83 × 21,021.79
  4. Step 4: Simplify right side
    77,181.20x = 2,433,773,141.76
  5. Step 5: Solve for x
    x = 2,433,773,141.76/77,181.20
  6. Step 6: Final answer
    x = 31,533.24

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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.