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Finding the Fourth Proportional to 216,187.44, 324,004.68 and 91,356.72

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Solution

The fourth proportional to 216,187.44, 324,004.68 and 91,356.72 is: 136,918.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,187.44 : 324,004.68 = 91,356.72 : x
  2. Step 2: Convert to fraction form
    216,187.44/324,004.68 = 91,356.72/x
  3. Step 3: Cross multiply
    216,187.44x = 324,004.68 × 91,356.72
  4. Step 4: Simplify right side
    216,187.44x = 29,600,004,829.45
  5. Step 5: Solve for x
    x = 29,600,004,829.45/216,187.44
  6. Step 6: Final answer
    x = 136,918.24

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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.