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Finding the Fourth Proportional to 57,777.41, 86,679.07 and 19,311.79

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Solution

The fourth proportional to 57,777.41, 86,679.07 and 19,311.79 is: 28,972.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,777.41 : 86,679.07 = 19,311.79 : x
  2. Step 2: Convert to fraction form
    57,777.41/86,679.07 = 19,311.79/x
  3. Step 3: Cross multiply
    57,777.41x = 86,679.07 × 19,311.79
  4. Step 4: Simplify right side
    57,777.41x = 1,673,927,997.24
  5. Step 5: Solve for x
    x = 1,673,927,997.24/57,777.41
  6. Step 6: Final answer
    x = 28,972.02

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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.