Home / 90,699.40-135,984.30-40,738.60

Finding the Fourth Proportional to 90,699.40, 135,984.30 and 40,738.60

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Solution

The fourth proportional to 90,699.40, 135,984.30 and 40,738.60 is: 61,078.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,699.40 : 135,984.30 = 40,738.60 : x
  2. Step 2: Convert to fraction form
    90,699.40/135,984.30 = 40,738.60/x
  3. Step 3: Cross multiply
    90,699.40x = 135,984.30 × 40,738.60
  4. Step 4: Simplify right side
    90,699.40x = 5,539,810,003.98
  5. Step 5: Solve for x
    x = 5,539,810,003.98/90,699.40
  6. Step 6: Final answer
    x = 61,078.79

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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.