Home / 90,231.20-135,346.80-84,326.30

Finding the Fourth Proportional to 90,231.20, 135,346.80 and 84,326.30

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Solution

The fourth proportional to 90,231.20, 135,346.80 and 84,326.30 is: 126,489.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,231.20 : 135,346.80 = 84,326.30 : x
  2. Step 2: Convert to fraction form
    90,231.20/135,346.80 = 84,326.30/x
  3. Step 3: Cross multiply
    90,231.20x = 135,346.80 × 84,326.30
  4. Step 4: Simplify right side
    90,231.20x = 11,413,294,860.84
  5. Step 5: Solve for x
    x = 11,413,294,860.84/90,231.20
  6. Step 6: Final answer
    x = 126,489.45

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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.