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Finding the Fourth Proportional to 120,831.40, 181,311.90 and 50,717.80

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Solution

The fourth proportional to 120,831.40, 181,311.90 and 50,717.80 is: 76,103.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,831.40 : 181,311.90 = 50,717.80 : x
  2. Step 2: Convert to fraction form
    120,831.40/181,311.90 = 50,717.80/x
  3. Step 3: Cross multiply
    120,831.40x = 181,311.90 × 50,717.80
  4. Step 4: Simplify right side
    120,831.40x = 9,195,740,681.82
  5. Step 5: Solve for x
    x = 9,195,740,681.82/120,831.40
  6. Step 6: Final answer
    x = 76,103.90

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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.