Home / 100,268.69-138,370.80-55,556.69

Finding the Fourth Proportional to 100,268.69, 138,370.80 and 55,556.69

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Solution

The fourth proportional to 100,268.69, 138,370.80 and 55,556.69 is: 76,668.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,268.69 : 138,370.80 = 55,556.69 : x
  2. Step 2: Convert to fraction form
    100,268.69/138,370.80 = 55,556.69/x
  3. Step 3: Cross multiply
    100,268.69x = 138,370.80 × 55,556.69
  4. Step 4: Simplify right side
    100,268.69x = 7,687,423,362.87
  5. Step 5: Solve for x
    x = 7,687,423,362.87/100,268.69
  6. Step 6: Final answer
    x = 76,668.23

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1.5x scale

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.