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Finding the Fourth Proportional to 276,121.41, 381,039.93 and 155,259.58

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Solution

The fourth proportional to 276,121.41, 381,039.93 and 155,259.58 is: 214,253.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,121.41 : 381,039.93 = 155,259.58 : x
  2. Step 2: Convert to fraction form
    276,121.41/381,039.93 = 155,259.58/x
  3. Step 3: Cross multiply
    276,121.41x = 381,039.93 × 155,259.58
  4. Step 4: Simplify right side
    276,121.41x = 59,160,099,495.03
  5. Step 5: Solve for x
    x = 59,160,099,495.03/276,121.41
  6. Step 6: Final answer
    x = 214,253.94

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.