Home / 100,211.22-138,384.45-75,016.98

Finding the Fourth Proportional to 100,211.22, 138,384.45 and 75,016.98

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Solution

The fourth proportional to 100,211.22, 138,384.45 and 75,016.98 is: 103,593.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,211.22 : 138,384.45 = 75,016.98 : x
  2. Step 2: Convert to fraction form
    100,211.22/138,384.45 = 75,016.98/x
  3. Step 3: Cross multiply
    100,211.22x = 138,384.45 × 75,016.98
  4. Step 4: Simplify right side
    100,211.22x = 10,381,183,517.96
  5. Step 5: Solve for x
    x = 10,381,183,517.96/100,211.22
  6. Step 6: Final answer
    x = 103,593.03

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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.