Home / 54,448.18-81,640.47-21,129.32

Finding the Fourth Proportional to 54,448.18, 81,640.47 and 21,129.32

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Solution

The fourth proportional to 54,448.18, 81,640.47 and 21,129.32 is: 31,681.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,448.18 : 81,640.47 = 21,129.32 : x
  2. Step 2: Convert to fraction form
    54,448.18/81,640.47 = 21,129.32/x
  3. Step 3: Cross multiply
    54,448.18x = 81,640.47 × 21,129.32
  4. Step 4: Simplify right side
    54,448.18x = 1,725,007,898.92
  5. Step 5: Solve for x
    x = 1,725,007,898.92/54,448.18
  6. Step 6: Final answer
    x = 31,681.64

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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.