Home / 90,936.81-125,499.11-55,128.33

Finding the Fourth Proportional to 90,936.81, 125,499.11 and 55,128.33

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Solution

The fourth proportional to 90,936.81, 125,499.11 and 55,128.33 is: 76,080.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,936.81 : 125,499.11 = 55,128.33 : x
  2. Step 2: Convert to fraction form
    90,936.81/125,499.11 = 55,128.33/x
  3. Step 3: Cross multiply
    90,936.81x = 125,499.11 × 55,128.33
  4. Step 4: Simplify right side
    90,936.81x = 6,918,556,350.79
  5. Step 5: Solve for x
    x = 6,918,556,350.79/90,936.81
  6. Step 6: Final answer
    x = 76,080.92

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.