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Finding the Fourth Proportional to 60,910.62, 91,381.68 and 18,789.77

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Solution

The fourth proportional to 60,910.62, 91,381.68 and 18,789.77 is: 28,189.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,910.62 : 91,381.68 = 18,789.77 : x
  2. Step 2: Convert to fraction form
    60,910.62/91,381.68 = 18,789.77/x
  3. Step 3: Cross multiply
    60,910.62x = 91,381.68 × 18,789.77
  4. Step 4: Simplify right side
    60,910.62x = 1,717,040,292.51
  5. Step 5: Solve for x
    x = 1,717,040,292.51/60,910.62
  6. Step 6: Final answer
    x = 28,189.51

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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.