Home / 54,821.85-75,721.62-39,690.54

Finding the Fourth Proportional to 54,821.85, 75,721.62 and 39,690.54

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Solution

The fourth proportional to 54,821.85, 75,721.62 and 39,690.54 is: 54,821.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,821.85 : 75,721.62 = 39,690.54 : x
  2. Step 2: Convert to fraction form
    54,821.85/75,721.62 = 39,690.54/x
  3. Step 3: Cross multiply
    54,821.85x = 75,721.62 × 39,690.54
  4. Step 4: Simplify right side
    54,821.85x = 3,005,432,136.31
  5. Step 5: Solve for x
    x = 3,005,432,136.31/54,821.85
  6. Step 6: Final answer
    x = 54,821.80

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1.5x scale

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.