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Finding the Fourth Proportional to 318,530.56, 477,839.76 and 108,112

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Solution

The fourth proportional to 318,530.56, 477,839.76 and 108,112 is: 162,182.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,530.56 : 477,839.76 = 108,112 : x
  2. Step 2: Convert to fraction form
    318,530.56/477,839.76 = 108,112/x
  3. Step 3: Cross multiply
    318,530.56x = 477,839.76 × 108,112
  4. Step 4: Simplify right side
    318,530.56x = 51,660,212,133.12
  5. Step 5: Solve for x
    x = 51,660,212,133.12/318,530.56
  6. Step 6: Final answer
    x = 162,182.91

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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.