Home / 90,336.12-135,635.40-66,716.52

Finding the Fourth Proportional to 90,336.12, 135,635.40 and 66,716.52

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Solution

The fourth proportional to 90,336.12, 135,635.40 and 66,716.52 is: 100,171.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,336.12 : 135,635.40 = 66,716.52 : x
  2. Step 2: Convert to fraction form
    90,336.12/135,635.40 = 66,716.52/x
  3. Step 3: Cross multiply
    90,336.12x = 135,635.40 × 66,716.52
  4. Step 4: Simplify right side
    90,336.12x = 9,049,121,876.81
  5. Step 5: Solve for x
    x = 9,049,121,876.81/90,336.12
  6. Step 6: Final answer
    x = 100,171.69

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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.