Home / 90,302.32-135,485.38-40,378

Finding the Fourth Proportional to 90,302.32, 135,485.38 and 40,378

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Solution

The fourth proportional to 90,302.32, 135,485.38 and 40,378 is: 60,581.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,302.32 : 135,485.38 = 40,378 : x
  2. Step 2: Convert to fraction form
    90,302.32/135,485.38 = 40,378/x
  3. Step 3: Cross multiply
    90,302.32x = 135,485.38 × 40,378
  4. Step 4: Simplify right side
    90,302.32x = 5,470,628,673.64
  5. Step 5: Solve for x
    x = 5,470,628,673.64/90,302.32
  6. Step 6: Final answer
    x = 60,581.26

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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.