Home / 281,488.24-388,439.28-154,139.20

Finding the Fourth Proportional to 281,488.24, 388,439.28 and 154,139.20

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Solution

The fourth proportional to 281,488.24, 388,439.28 and 154,139.20 is: 212,704.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,488.24 : 388,439.28 = 154,139.20 : x
  2. Step 2: Convert to fraction form
    281,488.24/388,439.28 = 154,139.20/x
  3. Step 3: Cross multiply
    281,488.24x = 388,439.28 × 154,139.20
  4. Step 4: Simplify right side
    281,488.24x = 59,873,719,867.78
  5. Step 5: Solve for x
    x = 59,873,719,867.78/281,488.24
  6. Step 6: Final answer
    x = 212,704.16

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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.