Home / 90,390.26-135,632.68-65,634.80

Finding the Fourth Proportional to 90,390.26, 135,632.68 and 65,634.80

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Solution

The fourth proportional to 90,390.26, 135,632.68 and 65,634.80 is: 98,486.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,390.26 : 135,632.68 = 65,634.80 : x
  2. Step 2: Convert to fraction form
    90,390.26/135,632.68 = 65,634.80/x
  3. Step 3: Cross multiply
    90,390.26x = 135,632.68 × 65,634.80
  4. Step 4: Simplify right side
    90,390.26x = 8,902,223,825.26
  5. Step 5: Solve for x
    x = 8,902,223,825.26/90,390.26
  6. Step 6: Final answer
    x = 98,486.54

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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.