Home / 281,449.80-388,389.06-154,123.20

Finding the Fourth Proportional to 281,449.80, 388,389.06 and 154,123.20

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Solution

The fourth proportional to 281,449.80, 388,389.06 and 154,123.20 is: 212,683.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,449.80 : 388,389.06 = 154,123.20 : x
  2. Step 2: Convert to fraction form
    281,449.80/388,389.06 = 154,123.20/x
  3. Step 3: Cross multiply
    281,449.80x = 388,389.06 × 154,123.20
  4. Step 4: Simplify right side
    281,449.80x = 59,859,764,772.19
  5. Step 5: Solve for x
    x = 59,859,764,772.19/281,449.80
  6. Step 6: Final answer
    x = 212,683.63

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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.