Home / 54,218.67-81,312.36-18,678.54

Finding the Fourth Proportional to 54,218.67, 81,312.36 and 18,678.54

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Solution

The fourth proportional to 54,218.67, 81,312.36 and 18,678.54 is: 28,012.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,218.67 : 81,312.36 = 18,678.54 : x
  2. Step 2: Convert to fraction form
    54,218.67/81,312.36 = 18,678.54/x
  3. Step 3: Cross multiply
    54,218.67x = 81,312.36 × 18,678.54
  4. Step 4: Simplify right side
    54,218.67x = 1,518,796,168.75
  5. Step 5: Solve for x
    x = 1,518,796,168.75/54,218.67
  6. Step 6: Final answer
    x = 28,012.42

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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.