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Finding the Fourth Proportional to 67,654.28, 101,469.54 and 20,907.56

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Solution

The fourth proportional to 67,654.28, 101,469.54 and 20,907.56 is: 31,357.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,654.28 : 101,469.54 = 20,907.56 : x
  2. Step 2: Convert to fraction form
    67,654.28/101,469.54 = 20,907.56/x
  3. Step 3: Cross multiply
    67,654.28x = 101,469.54 × 20,907.56
  4. Step 4: Simplify right side
    67,654.28x = 2,121,480,495.72
  5. Step 5: Solve for x
    x = 2,121,480,495.72/67,654.28
  6. Step 6: Final answer
    x = 31,357.67

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1.5x scale

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.