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Finding the Fourth Proportional to 276,172.84, 381,131.44 and 153,665.90

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Solution

The fourth proportional to 276,172.84, 381,131.44 and 153,665.90 is: 212,066.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,172.84 : 381,131.44 = 153,665.90 : x
  2. Step 2: Convert to fraction form
    276,172.84/381,131.44 = 153,665.90/x
  3. Step 3: Cross multiply
    276,172.84x = 381,131.44 × 153,665.90
  4. Step 4: Simplify right side
    276,172.84x = 58,566,905,745.90
  5. Step 5: Solve for x
    x = 58,566,905,745.90/276,172.84
  6. Step 6: Final answer
    x = 212,066.13

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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.