Home / 100,609.20-138,831.66-55,286.64

Finding the Fourth Proportional to 100,609.20, 138,831.66 and 55,286.64

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Solution

The fourth proportional to 100,609.20, 138,831.66 and 55,286.64 is: 76,290.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,609.20 : 138,831.66 = 55,286.64 : x
  2. Step 2: Convert to fraction form
    100,609.20/138,831.66 = 55,286.64/x
  3. Step 3: Cross multiply
    100,609.20x = 138,831.66 × 55,286.64
  4. Step 4: Simplify right side
    100,609.20x = 7,675,536,007.02
  5. Step 5: Solve for x
    x = 7,675,536,007.02/100,609.20
  6. Step 6: Final answer
    x = 76,290.60

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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.