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Finding the Fourth Proportional to 212,353.93, 318,533.42 and 72,123.49

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Solution

The fourth proportional to 212,353.93, 318,533.42 and 72,123.49 is: 108,186.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,353.93 : 318,533.42 = 72,123.49 : x
  2. Step 2: Convert to fraction form
    212,353.93/318,533.42 = 72,123.49/x
  3. Step 3: Cross multiply
    212,353.93x = 318,533.42 × 72,123.49
  4. Step 4: Simplify right side
    212,353.93x = 22,973,741,932.04
  5. Step 5: Solve for x
    x = 22,973,741,932.04/212,353.93
  6. Step 6: Final answer
    x = 108,186.09

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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.