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Finding the Fourth Proportional to 100,062.07, 138,081.69 and 54,738.88

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Solution

The fourth proportional to 100,062.07, 138,081.69 and 54,738.88 is: 75,537.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,062.07 : 138,081.69 = 54,738.88 : x
  2. Step 2: Convert to fraction form
    100,062.07/138,081.69 = 54,738.88/x
  3. Step 3: Cross multiply
    100,062.07x = 138,081.69 × 54,738.88
  4. Step 4: Simplify right side
    100,062.07x = 7,558,436,713.90
  5. Step 5: Solve for x
    x = 7,558,436,713.90/100,062.07
  6. Step 6: Final answer
    x = 75,537.48

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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.