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Finding the Fourth Proportional to 212,369.70, 318,554.16 and 145,607.43

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Solution

The fourth proportional to 212,369.70, 318,554.16 and 145,607.43 is: 218,410.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,369.70 : 318,554.16 = 145,607.43 : x
  2. Step 2: Convert to fraction form
    212,369.70/318,554.16 = 145,607.43/x
  3. Step 3: Cross multiply
    212,369.70x = 318,554.16 × 145,607.43
  4. Step 4: Simplify right side
    212,369.70x = 46,383,852,553.41
  5. Step 5: Solve for x
    x = 46,383,852,553.41/212,369.70
  6. Step 6: Final answer
    x = 218,410.88

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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.