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Finding the Fourth Proportional to 57,714.20, 86,579.40 and 18,267.20

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Solution

The fourth proportional to 57,714.20, 86,579.40 and 18,267.20 is: 27,403.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,714.20 : 86,579.40 = 18,267.20 : x
  2. Step 2: Convert to fraction form
    57,714.20/86,579.40 = 18,267.20/x
  3. Step 3: Cross multiply
    57,714.20x = 86,579.40 × 18,267.20
  4. Step 4: Simplify right side
    57,714.20x = 1,581,563,215.68
  5. Step 5: Solve for x
    x = 1,581,563,215.68/57,714.20
  6. Step 6: Final answer
    x = 27,403.36

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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.