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Finding the Fourth Proportional to 81,384.96, 122,089.68 and 28,794.96

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Solution

The fourth proportional to 81,384.96, 122,089.68 and 28,794.96 is: 43,196.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,384.96 : 122,089.68 = 28,794.96 : x
  2. Step 2: Convert to fraction form
    81,384.96/122,089.68 = 28,794.96/x
  3. Step 3: Cross multiply
    81,384.96x = 122,089.68 × 28,794.96
  4. Step 4: Simplify right side
    81,384.96x = 3,515,567,452.01
  5. Step 5: Solve for x
    x = 3,515,567,452.01/81,384.96
  6. Step 6: Final answer
    x = 43,196.77

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1.5x scale

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.