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Finding the Fourth Proportional to 57,458.99, 86,188.49 and 18,019.28

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Solution

The fourth proportional to 57,458.99, 86,188.49 and 18,019.28 is: 27,028.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,458.99 : 86,188.49 = 18,019.28 : x
  2. Step 2: Convert to fraction form
    57,458.99/86,188.49 = 18,019.28/x
  3. Step 3: Cross multiply
    57,458.99x = 86,188.49 × 18,019.28
  4. Step 4: Simplify right side
    57,458.99x = 1,553,054,013.05
  5. Step 5: Solve for x
    x = 1,553,054,013.05/57,458.99
  6. Step 6: Final answer
    x = 27,028.91

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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.