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Finding the Fourth Proportional to 100,086.74, 138,117.57 and 54,764.54

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Solution

The fourth proportional to 100,086.74, 138,117.57 and 54,764.54 is: 75,573.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,086.74 : 138,117.57 = 54,764.54 : x
  2. Step 2: Convert to fraction form
    100,086.74/138,117.57 = 54,764.54/x
  3. Step 3: Cross multiply
    100,086.74x = 138,117.57 × 54,764.54
  4. Step 4: Simplify right side
    100,086.74x = 7,563,945,186.97
  5. Step 5: Solve for x
    x = 7,563,945,186.97/100,086.74
  6. Step 6: Final answer
    x = 75,573.90

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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.