Home / 54,086.54-81,128.93-20,813.83

Finding the Fourth Proportional to 54,086.54, 81,128.93 and 20,813.83

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Solution

The fourth proportional to 54,086.54, 81,128.93 and 20,813.83 is: 31,220.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,086.54 : 81,128.93 = 20,813.83 : x
  2. Step 2: Convert to fraction form
    54,086.54/81,128.93 = 20,813.83/x
  3. Step 3: Cross multiply
    54,086.54x = 81,128.93 × 20,813.83
  4. Step 4: Simplify right side
    54,086.54x = 1,688,603,450.21
  5. Step 5: Solve for x
    x = 1,688,603,450.21/54,086.54
  6. Step 6: Final answer
    x = 31,220.40

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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.