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Finding the Fourth Proportional to 100,072.74, 138,101.40 and 54,749.73

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Solution

The fourth proportional to 100,072.74, 138,101.40 and 54,749.73 is: 75,555.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,072.74 : 138,101.40 = 54,749.73 : x
  2. Step 2: Convert to fraction form
    100,072.74/138,101.40 = 54,749.73/x
  3. Step 3: Cross multiply
    100,072.74x = 138,101.40 × 54,749.73
  4. Step 4: Simplify right side
    100,072.74x = 7,561,014,362.62
  5. Step 5: Solve for x
    x = 7,561,014,362.62/100,072.74
  6. Step 6: Final answer
    x = 75,555.18

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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.