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Finding the Fourth Proportional to 81,388.53, 122,084.24 and 28,798.29

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Solution

The fourth proportional to 81,388.53, 122,084.24 and 28,798.29 is: 43,197.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,388.53 : 122,084.24 = 28,798.29 : x
  2. Step 2: Convert to fraction form
    81,388.53/122,084.24 = 28,798.29/x
  3. Step 3: Cross multiply
    81,388.53x = 122,084.24 × 28,798.29
  4. Step 4: Simplify right side
    81,388.53x = 3,515,817,203.96
  5. Step 5: Solve for x
    x = 3,515,817,203.96/81,388.53
  6. Step 6: Final answer
    x = 43,197.94

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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.