Home / 90,698.88-136,245.14-76,687.04

Finding the Fourth Proportional to 90,698.88, 136,245.14 and 76,687.04

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Solution

The fourth proportional to 90,698.88, 136,245.14 and 76,687.04 is: 115,196.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,698.88 : 136,245.14 = 76,687.04 : x
  2. Step 2: Convert to fraction form
    90,698.88/136,245.14 = 76,687.04/x
  3. Step 3: Cross multiply
    90,698.88x = 136,245.14 × 76,687.04
  4. Step 4: Simplify right side
    90,698.88x = 10,448,236,500.99
  5. Step 5: Solve for x
    x = 10,448,236,500.99/90,698.88
  6. Step 6: Final answer
    x = 115,196.97

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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.