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Finding the Fourth Proportional to 216,112.78, 324,195.06 and 66,333.45

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Solution

The fourth proportional to 216,112.78, 324,195.06 and 66,333.45 is: 99,508.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,112.78 : 324,195.06 = 66,333.45 : x
  2. Step 2: Convert to fraction form
    216,112.78/324,195.06 = 66,333.45/x
  3. Step 3: Cross multiply
    216,112.78x = 324,195.06 × 66,333.45
  4. Step 4: Simplify right side
    216,112.78x = 21,504,977,894.11
  5. Step 5: Solve for x
    x = 21,504,977,894.11/216,112.78
  6. Step 6: Final answer
    x = 99,508.13

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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.