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Finding the Fourth Proportional to 84,940.40, 127,507.80 and 49,899.80

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Solution

The fourth proportional to 84,940.40, 127,507.80 and 49,899.80 is: 74,906.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,940.40 : 127,507.80 = 49,899.80 : x
  2. Step 2: Convert to fraction form
    84,940.40/127,507.80 = 49,899.80/x
  3. Step 3: Cross multiply
    84,940.40x = 127,507.80 × 49,899.80
  4. Step 4: Simplify right side
    84,940.40x = 6,362,613,718.44
  5. Step 5: Solve for x
    x = 6,362,613,718.44/84,940.40
  6. Step 6: Final answer
    x = 74,906.80

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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.