Home / 90,765.12-136,162.26-38,189.64

Finding the Fourth Proportional to 90,765.12, 136,162.26 and 38,189.64

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Solution

The fourth proportional to 90,765.12, 136,162.26 and 38,189.64 is: 57,290.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,765.12 : 136,162.26 = 38,189.64 : x
  2. Step 2: Convert to fraction form
    90,765.12/136,162.26 = 38,189.64/x
  3. Step 3: Cross multiply
    90,765.12x = 136,162.26 × 38,189.64
  4. Step 4: Simplify right side
    90,765.12x = 5,199,987,690.99
  5. Step 5: Solve for x
    x = 5,199,987,690.99/90,765.12
  6. Step 6: Final answer
    x = 57,290.59

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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.