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Finding the Fourth Proportional to 81,798.89, 122,698.37 and 25,643.42

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Solution

The fourth proportional to 81,798.89, 122,698.37 and 25,643.42 is: 38,465.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,798.89 : 122,698.37 = 25,643.42 : x
  2. Step 2: Convert to fraction form
    81,798.89/122,698.37 = 25,643.42/x
  3. Step 3: Cross multiply
    81,798.89x = 122,698.37 × 25,643.42
  4. Step 4: Simplify right side
    81,798.89x = 3,146,405,285.84
  5. Step 5: Solve for x
    x = 3,146,405,285.84/81,798.89
  6. Step 6: Final answer
    x = 38,465.13

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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.