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Finding the Fourth Proportional to 216,968.62, 325,504.89 and 90,538.54

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Solution

The fourth proportional to 216,968.62, 325,504.89 and 90,538.54 is: 135,829.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,968.62 : 325,504.89 = 90,538.54 : x
  2. Step 2: Convert to fraction form
    216,968.62/325,504.89 = 90,538.54/x
  3. Step 3: Cross multiply
    216,968.62x = 325,504.89 × 90,538.54
  4. Step 4: Simplify right side
    216,968.62x = 29,470,736,689.70
  5. Step 5: Solve for x
    x = 29,470,736,689.70/216,968.62
  6. Step 6: Final answer
    x = 135,829.49

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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.