Home / 100,447.03-138,615.61-55,125.43

Finding the Fourth Proportional to 100,447.03, 138,615.61 and 55,125.43

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Solution

The fourth proportional to 100,447.03, 138,615.61 and 55,125.43 is: 76,072.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,447.03 : 138,615.61 = 55,125.43 : x
  2. Step 2: Convert to fraction form
    100,447.03/138,615.61 = 55,125.43/x
  3. Step 3: Cross multiply
    100,447.03x = 138,615.61 × 55,125.43
  4. Step 4: Simplify right side
    100,447.03x = 7,641,245,105.96
  5. Step 5: Solve for x
    x = 7,641,245,105.96/100,447.03
  6. Step 6: Final answer
    x = 76,072.38

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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.