Home / 81,915.11-122,889.06-25,769.34

Finding the Fourth Proportional to 81,915.11, 122,889.06 and 25,769.34

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Solution

The fourth proportional to 81,915.11, 122,889.06 and 25,769.34 is: 38,659.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,915.11 : 122,889.06 = 25,769.34 : x
  2. Step 2: Convert to fraction form
    81,915.11/122,889.06 = 25,769.34/x
  3. Step 3: Cross multiply
    81,915.11x = 122,889.06 × 25,769.34
  4. Step 4: Simplify right side
    81,915.11x = 3,166,769,969.42
  5. Step 5: Solve for x
    x = 3,166,769,969.42/81,915.11
  6. Step 6: Final answer
    x = 38,659.17

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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.