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Finding the Fourth Proportional to 212,346.54, 318,189.24 and 79,191

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Solution

The fourth proportional to 212,346.54, 318,189.24 and 79,191 is: 118,663.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,346.54 : 318,189.24 = 79,191 : x
  2. Step 2: Convert to fraction form
    212,346.54/318,189.24 = 79,191/x
  3. Step 3: Cross multiply
    212,346.54x = 318,189.24 × 79,191
  4. Step 4: Simplify right side
    212,346.54x = 25,197,724,104.84
  5. Step 5: Solve for x
    x = 25,197,724,104.84/212,346.54
  6. Step 6: Final answer
    x = 118,663.22

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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.