Home / 90,631.80-135,928.26-28,268.28

Finding the Fourth Proportional to 90,631.80, 135,928.26 and 28,268.28

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Solution

The fourth proportional to 90,631.80, 135,928.26 and 28,268.28 is: 42,396.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,631.80 : 135,928.26 = 28,268.28 : x
  2. Step 2: Convert to fraction form
    90,631.80/135,928.26 = 28,268.28/x
  3. Step 3: Cross multiply
    90,631.80x = 135,928.26 × 28,268.28
  4. Step 4: Simplify right side
    90,631.80x = 3,842,458,113.59
  5. Step 5: Solve for x
    x = 3,842,458,113.59/90,631.80
  6. Step 6: Final answer
    x = 42,396.36

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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.