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Finding the Fourth Proportional to 216,813.31, 325,313.01 and 83,787.01

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Solution

The fourth proportional to 216,813.31, 325,313.01 and 83,787.01 is: 125,716.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,813.31 : 325,313.01 = 83,787.01 : x
  2. Step 2: Convert to fraction form
    216,813.31/325,313.01 = 83,787.01/x
  3. Step 3: Cross multiply
    216,813.31x = 325,313.01 × 83,787.01
  4. Step 4: Simplify right side
    216,813.31x = 27,257,003,608.72
  5. Step 5: Solve for x
    x = 27,257,003,608.72/216,813.31
  6. Step 6: Final answer
    x = 125,716.47

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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.