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Finding the Fourth Proportional to 138,831.78, 208,247.67 and 33,650.75

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Solution

The fourth proportional to 138,831.78, 208,247.67 and 33,650.75 is: 50,476.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,831.78 : 208,247.67 = 33,650.75 : x
  2. Step 2: Convert to fraction form
    138,831.78/208,247.67 = 33,650.75/x
  3. Step 3: Cross multiply
    138,831.78x = 208,247.67 × 33,650.75
  4. Step 4: Simplify right side
    138,831.78x = 7,007,690,281.25
  5. Step 5: Solve for x
    x = 7,007,690,281.25/138,831.78
  6. Step 6: Final answer
    x = 50,476.13

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1.5x scale

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.