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Finding the Fourth Proportional to 81,485.63, 122,231.01 and 25,326.04

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Solution

The fourth proportional to 81,485.63, 122,231.01 and 25,326.04 is: 37,989.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,485.63 : 122,231.01 = 25,326.04 : x
  2. Step 2: Convert to fraction form
    81,485.63/122,231.01 = 25,326.04/x
  3. Step 3: Cross multiply
    81,485.63x = 122,231.01 × 25,326.04
  4. Step 4: Simplify right side
    81,485.63x = 3,095,626,837.35
  5. Step 5: Solve for x
    x = 3,095,626,837.35/81,485.63
  6. Step 6: Final answer
    x = 37,989.85

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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.