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Finding the Fourth Proportional to 57,855.60, 86,789.78 and 18,403.50

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Solution

The fourth proportional to 57,855.60, 86,789.78 and 18,403.50 is: 27,607.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,855.60 : 86,789.78 = 18,403.50 : x
  2. Step 2: Convert to fraction form
    57,855.60/86,789.78 = 18,403.50/x
  3. Step 3: Cross multiply
    57,855.60x = 86,789.78 × 18,403.50
  4. Step 4: Simplify right side
    57,855.60x = 1,597,236,018.69
  5. Step 5: Solve for x
    x = 1,597,236,018.69/57,855.60
  6. Step 6: Final answer
    x = 27,607.28

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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.