Home / 221,020.81-305,045.56-130,399.22

Finding the Fourth Proportional to 221,020.81, 305,045.56 and 130,399.22

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Solution

The fourth proportional to 221,020.81, 305,045.56 and 130,399.22 is: 179,972.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,020.81 : 305,045.56 = 130,399.22 : x
  2. Step 2: Convert to fraction form
    221,020.81/305,045.56 = 130,399.22/x
  3. Step 3: Cross multiply
    221,020.81x = 305,045.56 × 130,399.22
  4. Step 4: Simplify right side
    221,020.81x = 39,777,704,014.08
  5. Step 5: Solve for x
    x = 39,777,704,014.08/221,020.81
  6. Step 6: Final answer
    x = 179,972.67

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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.