Home / 54,365.78-81,569.43-21,109.19

Finding the Fourth Proportional to 54,365.78, 81,569.43 and 21,109.19

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Solution

The fourth proportional to 54,365.78, 81,569.43 and 21,109.19 is: 31,671.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,365.78 : 81,569.43 = 21,109.19 : x
  2. Step 2: Convert to fraction form
    54,365.78/81,569.43 = 21,109.19/x
  3. Step 3: Cross multiply
    54,365.78x = 81,569.43 × 21,109.19
  4. Step 4: Simplify right side
    54,365.78x = 1,721,864,188.21
  5. Step 5: Solve for x
    x = 1,721,864,188.21/54,365.78
  6. Step 6: Final answer
    x = 31,671.84

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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.