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Finding the Fourth Proportional to 57,979.99, 86,978.18 and 18,527.87

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Solution

The fourth proportional to 57,979.99, 86,978.18 and 18,527.87 is: 27,794.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,979.99 : 86,978.18 = 18,527.87 : x
  2. Step 2: Convert to fraction form
    57,979.99/86,978.18 = 18,527.87/x
  3. Step 3: Cross multiply
    57,979.99x = 86,978.18 × 18,527.87
  4. Step 4: Simplify right side
    57,979.99x = 1,611,520,411.88
  5. Step 5: Solve for x
    x = 1,611,520,411.88/57,979.99
  6. Step 6: Final answer
    x = 27,794.42

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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.