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Finding the Fourth Proportional to 100,576.35, 138,795.12 and 55,257.39

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Solution

The fourth proportional to 100,576.35, 138,795.12 and 55,257.39 is: 76,255.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,576.35 : 138,795.12 = 55,257.39 : x
  2. Step 2: Convert to fraction form
    100,576.35/138,795.12 = 55,257.39/x
  3. Step 3: Cross multiply
    100,576.35x = 138,795.12 × 55,257.39
  4. Step 4: Simplify right side
    100,576.35x = 7,669,456,075.94
  5. Step 5: Solve for x
    x = 7,669,456,075.94/100,576.35
  6. Step 6: Final answer
    x = 76,255.06

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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.