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Finding the Fourth Proportional to 204,831.80, 307,247.70 and 80,172.80

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Solution

The fourth proportional to 204,831.80, 307,247.70 and 80,172.80 is: 120,259.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    204,831.80 : 307,247.70 = 80,172.80 : x
  2. Step 2: Convert to fraction form
    204,831.80/307,247.70 = 80,172.80/x
  3. Step 3: Cross multiply
    204,831.80x = 307,247.70 × 80,172.80
  4. Step 4: Simplify right side
    204,831.80x = 24,632,908,402.56
  5. Step 5: Solve for x
    x = 24,632,908,402.56/204,831.80
  6. Step 6: Final answer
    x = 120,259.20

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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.