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Finding the Fourth Proportional to 57,699.64, 86,554.32 and 18,255.88

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Solution

The fourth proportional to 57,699.64, 86,554.32 and 18,255.88 is: 27,385.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,699.64 : 86,554.32 = 18,255.88 : x
  2. Step 2: Convert to fraction form
    57,699.64/86,554.32 = 18,255.88/x
  3. Step 3: Cross multiply
    57,699.64x = 86,554.32 × 18,255.88
  4. Step 4: Simplify right side
    57,699.64x = 1,580,125,279.40
  5. Step 5: Solve for x
    x = 1,580,125,279.40/57,699.64
  6. Step 6: Final answer
    x = 27,385.36

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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.