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Finding the Fourth Proportional to 84,940.84, 127,411.56 and 25,777

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Solution

The fourth proportional to 84,940.84, 127,411.56 and 25,777 is: 38,665.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,940.84 : 127,411.56 = 25,777 : x
  2. Step 2: Convert to fraction form
    84,940.84/127,411.56 = 25,777/x
  3. Step 3: Cross multiply
    84,940.84x = 127,411.56 × 25,777
  4. Step 4: Simplify right side
    84,940.84x = 3,284,287,782.12
  5. Step 5: Solve for x
    x = 3,284,287,782.12/84,940.84
  6. Step 6: Final answer
    x = 38,665.59

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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.