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Finding the Fourth Proportional to 212,928, 318,727.66 and 156,831.44

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Solution

The fourth proportional to 212,928, 318,727.66 and 156,831.44 is: 234,757.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,928 : 318,727.66 = 156,831.44 : x
  2. Step 2: Convert to fraction form
    212,928/318,727.66 = 156,831.44/x
  3. Step 3: Cross multiply
    212,928x = 318,727.66 × 156,831.44
  4. Step 4: Simplify right side
    212,928x = 49,986,517,885.63
  5. Step 5: Solve for x
    x = 49,986,517,885.63/212,928
  6. Step 6: Final answer
    x = 234,757.84

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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.