Home / 154,557.28-231,747-82,421.20

Finding the Fourth Proportional to 154,557.28, 231,747 and 82,421.20

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Solution

The fourth proportional to 154,557.28, 231,747 and 82,421.20 is: 123,584.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,557.28 : 231,747 = 82,421.20 : x
  2. Step 2: Convert to fraction form
    154,557.28/231,747 = 82,421.20/x
  3. Step 3: Cross multiply
    154,557.28x = 231,747 × 82,421.20
  4. Step 4: Simplify right side
    154,557.28x = 19,100,865,836.40
  5. Step 5: Solve for x
    x = 19,100,865,836.40/154,557.28
  6. Step 6: Final answer
    x = 123,584.38

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.