Home / 83,439.81-125,145.87-30,121.56

Finding the Fourth Proportional to 83,439.81, 125,145.87 and 30,121.56

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Solution

The fourth proportional to 83,439.81, 125,145.87 and 30,121.56 is: 45,177.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,439.81 : 125,145.87 = 30,121.56 : x
  2. Step 2: Convert to fraction form
    83,439.81/125,145.87 = 30,121.56/x
  3. Step 3: Cross multiply
    83,439.81x = 125,145.87 × 30,121.56
  4. Step 4: Simplify right side
    83,439.81x = 3,769,588,831.96
  5. Step 5: Solve for x
    x = 3,769,588,831.96/83,439.81
  6. Step 6: Final answer
    x = 45,177.34

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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.