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Finding the Fourth Proportional to 84,855.69, 127,299.94 and 28,704.92

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Solution

The fourth proportional to 84,855.69, 127,299.94 and 28,704.92 is: 43,062.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,855.69 : 127,299.94 = 28,704.92 : x
  2. Step 2: Convert to fraction form
    84,855.69/127,299.94 = 28,704.92/x
  3. Step 3: Cross multiply
    84,855.69x = 127,299.94 × 28,704.92
  4. Step 4: Simplify right side
    84,855.69x = 3,654,134,593.70
  5. Step 5: Solve for x
    x = 3,654,134,593.70/84,855.69
  6. Step 6: Final answer
    x = 43,062.93

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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.