Home / 90,040.68-135,059.40-30,876.66

Finding the Fourth Proportional to 90,040.68, 135,059.40 and 30,876.66

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Solution

The fourth proportional to 90,040.68, 135,059.40 and 30,876.66 is: 46,314.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,040.68 : 135,059.40 = 30,876.66 : x
  2. Step 2: Convert to fraction form
    90,040.68/135,059.40 = 30,876.66/x
  3. Step 3: Cross multiply
    90,040.68x = 135,059.40 × 30,876.66
  4. Step 4: Simplify right side
    90,040.68x = 4,170,183,173.60
  5. Step 5: Solve for x
    x = 4,170,183,173.60/90,040.68
  6. Step 6: Final answer
    x = 46,314.43

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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.