Home / 54,438.36-81,641.94-21,151.28

Finding the Fourth Proportional to 54,438.36, 81,641.94 and 21,151.28

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Solution

The fourth proportional to 54,438.36, 81,641.94 and 21,151.28 is: 31,720.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,438.36 : 81,641.94 = 21,151.28 : x
  2. Step 2: Convert to fraction form
    54,438.36/81,641.94 = 21,151.28/x
  3. Step 3: Cross multiply
    54,438.36x = 81,641.94 × 21,151.28
  4. Step 4: Simplify right side
    54,438.36x = 1,726,831,124.47
  5. Step 5: Solve for x
    x = 1,726,831,124.47/54,438.36
  6. Step 6: Final answer
    x = 31,720.85

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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.