Home / 100,103.54-138,147.09-55,391.54

Finding the Fourth Proportional to 100,103.54, 138,147.09 and 55,391.54

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Solution

The fourth proportional to 100,103.54, 138,147.09 and 55,391.54 is: 76,442.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,103.54 : 138,147.09 = 55,391.54 : x
  2. Step 2: Convert to fraction form
    100,103.54/138,147.09 = 55,391.54/x
  3. Step 3: Cross multiply
    100,103.54x = 138,147.09 × 55,391.54
  4. Step 4: Simplify right side
    100,103.54x = 7,652,180,061.62
  5. Step 5: Solve for x
    x = 7,652,180,061.62/100,103.54
  6. Step 6: Final answer
    x = 76,442.65

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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.