Home / 90,968.03-136,301.21-55,321.53

Finding the Fourth Proportional to 90,968.03, 136,301.21 and 55,321.53

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Solution

The fourth proportional to 90,968.03, 136,301.21 and 55,321.53 is: 82,890.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,968.03 : 136,301.21 = 55,321.53 : x
  2. Step 2: Convert to fraction form
    90,968.03/136,301.21 = 55,321.53/x
  3. Step 3: Cross multiply
    90,968.03x = 136,301.21 × 55,321.53
  4. Step 4: Simplify right side
    90,968.03x = 7,540,391,975.65
  5. Step 5: Solve for x
    x = 7,540,391,975.65/90,968.03
  6. Step 6: Final answer
    x = 82,890.57

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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.