Home / 90,078.36-135,120.34-30,913.26

Finding the Fourth Proportional to 90,078.36, 135,120.34 and 30,913.26

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Solution

The fourth proportional to 90,078.36, 135,120.34 and 30,913.26 is: 46,370.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,078.36 : 135,120.34 = 30,913.26 : x
  2. Step 2: Convert to fraction form
    90,078.36/135,120.34 = 30,913.26/x
  3. Step 3: Cross multiply
    90,078.36x = 135,120.34 × 30,913.26
  4. Step 4: Simplify right side
    90,078.36x = 4,177,010,201.71
  5. Step 5: Solve for x
    x = 4,177,010,201.71/90,078.36
  6. Step 6: Final answer
    x = 46,370.85

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1.5x scale

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.