Home / 81,392.10-122,124.60-28,839.30

Finding the Fourth Proportional to 81,392.10, 122,124.60 and 28,839.30

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Solution

The fourth proportional to 81,392.10, 122,124.60 and 28,839.30 is: 43,271.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,392.10 : 122,124.60 = 28,839.30 : x
  2. Step 2: Convert to fraction form
    81,392.10/122,124.60 = 28,839.30/x
  3. Step 3: Cross multiply
    81,392.10x = 122,124.60 × 28,839.30
  4. Step 4: Simplify right side
    81,392.10x = 3,521,987,976.78
  5. Step 5: Solve for x
    x = 3,521,987,976.78/81,392.10
  6. Step 6: Final answer
    x = 43,271.87

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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.