Home / 54,328.70-81,505.20-21,045.80

Finding the Fourth Proportional to 54,328.70, 81,505.20 and 21,045.80

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Solution

The fourth proportional to 54,328.70, 81,505.20 and 21,045.80 is: 31,573.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,328.70 : 81,505.20 = 21,045.80 : x
  2. Step 2: Convert to fraction form
    54,328.70/81,505.20 = 21,045.80/x
  3. Step 3: Cross multiply
    54,328.70x = 81,505.20 × 21,045.80
  4. Step 4: Simplify right side
    54,328.70x = 1,715,342,138.16
  5. Step 5: Solve for x
    x = 1,715,342,138.16/54,328.70
  6. Step 6: Final answer
    x = 31,573.41

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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.