Home / 281,447.80-388,386.30-154,121.20

Finding the Fourth Proportional to 281,447.80, 388,386.30 and 154,121.20

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Solution

The fourth proportional to 281,447.80, 388,386.30 and 154,121.20 is: 212,680.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,447.80 : 388,386.30 = 154,121.20 : x
  2. Step 2: Convert to fraction form
    281,447.80/388,386.30 = 154,121.20/x
  3. Step 3: Cross multiply
    281,447.80x = 388,386.30 × 154,121.20
  4. Step 4: Simplify right side
    281,447.80x = 59,858,562,619.56
  5. Step 5: Solve for x
    x = 59,858,562,619.56/281,447.80
  6. Step 6: Final answer
    x = 212,680.87

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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.