Home / 190,635.40-285,767.20-90,768.75

Finding the Fourth Proportional to 190,635.40, 285,767.20 and 90,768.75

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Solution

The fourth proportional to 190,635.40, 285,767.20 and 90,768.75 is: 136,064.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,635.40 : 285,767.20 = 90,768.75 : x
  2. Step 2: Convert to fraction form
    190,635.40/285,767.20 = 90,768.75/x
  3. Step 3: Cross multiply
    190,635.40x = 285,767.20 × 90,768.75
  4. Step 4: Simplify right side
    190,635.40x = 25,938,731,535
  5. Step 5: Solve for x
    x = 25,938,731,535/190,635.40
  6. Step 6: Final answer
    x = 136,064.61

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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.