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Finding the Fourth Proportional to 100,258.44, 138,356.56 and 54,939.36

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Solution

The fourth proportional to 100,258.44, 138,356.56 and 54,939.36 is: 75,816.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,258.44 : 138,356.56 = 54,939.36 : x
  2. Step 2: Convert to fraction form
    100,258.44/138,356.56 = 54,939.36/x
  3. Step 3: Cross multiply
    100,258.44x = 138,356.56 × 54,939.36
  4. Step 4: Simplify right side
    100,258.44x = 7,601,220,858.20
  5. Step 5: Solve for x
    x = 7,601,220,858.20/100,258.44
  6. Step 6: Final answer
    x = 75,816.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.