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Finding the Fourth Proportional to 279,981.60, 419,863.20 and 122,102.40

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Solution

The fourth proportional to 279,981.60, 419,863.20 and 122,102.40 is: 183,105.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,981.60 : 419,863.20 = 122,102.40 : x
  2. Step 2: Convert to fraction form
    279,981.60/419,863.20 = 122,102.40/x
  3. Step 3: Cross multiply
    279,981.60x = 419,863.20 × 122,102.40
  4. Step 4: Simplify right side
    279,981.60x = 51,266,304,391.68
  5. Step 5: Solve for x
    x = 51,266,304,391.68/279,981.60
  6. Step 6: Final answer
    x = 183,105.98

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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.