Home / 54,745.20-82,117.80-19,680.30

Finding the Fourth Proportional to 54,745.20, 82,117.80 and 19,680.30

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Solution

The fourth proportional to 54,745.20, 82,117.80 and 19,680.30 is: 29,520.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,745.20 : 82,117.80 = 19,680.30 : x
  2. Step 2: Convert to fraction form
    54,745.20/82,117.80 = 19,680.30/x
  3. Step 3: Cross multiply
    54,745.20x = 82,117.80 × 19,680.30
  4. Step 4: Simplify right side
    54,745.20x = 1,616,102,939.34
  5. Step 5: Solve for x
    x = 1,616,102,939.34/54,745.20
  6. Step 6: Final answer
    x = 29,520.45

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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.