Home / 54,376.20-81,515.70-21,085.20

Finding the Fourth Proportional to 54,376.20, 81,515.70 and 21,085.20

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Solution

The fourth proportional to 54,376.20, 81,515.70 and 21,085.20 is: 31,608.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,376.20 : 81,515.70 = 21,085.20 : x
  2. Step 2: Convert to fraction form
    54,376.20/81,515.70 = 21,085.20/x
  3. Step 3: Cross multiply
    54,376.20x = 81,515.70 × 21,085.20
  4. Step 4: Simplify right side
    54,376.20x = 1,718,774,837.64
  5. Step 5: Solve for x
    x = 1,718,774,837.64/54,376.20
  6. Step 6: Final answer
    x = 31,608.95

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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.