Home / 54,438.72-81,663.30-21,161.40

Finding the Fourth Proportional to 54,438.72, 81,663.30 and 21,161.40

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Solution

The fourth proportional to 54,438.72, 81,663.30 and 21,161.40 is: 31,744.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,438.72 : 81,663.30 = 21,161.40 : x
  2. Step 2: Convert to fraction form
    54,438.72/81,663.30 = 21,161.40/x
  3. Step 3: Cross multiply
    54,438.72x = 81,663.30 × 21,161.40
  4. Step 4: Simplify right side
    54,438.72x = 1,728,109,756.62
  5. Step 5: Solve for x
    x = 1,728,109,756.62/54,438.72
  6. Step 6: Final answer
    x = 31,744.13

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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.