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Finding the Fourth Proportional to 216,696.87, 324,920.31 and 66,897.09

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Solution

The fourth proportional to 216,696.87, 324,920.31 and 66,897.09 is: 100,307.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,696.87 : 324,920.31 = 66,897.09 : x
  2. Step 2: Convert to fraction form
    216,696.87/324,920.31 = 66,897.09/x
  3. Step 3: Cross multiply
    216,696.87x = 324,920.31 × 66,897.09
  4. Step 4: Simplify right side
    216,696.87x = 21,736,223,220.90
  5. Step 5: Solve for x
    x = 21,736,223,220.90/216,696.87
  6. Step 6: Final answer
    x = 100,307.05

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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.