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Finding the Fourth Proportional to 78,169.28, 117,183.84 and 28,237.64

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Solution

The fourth proportional to 78,169.28, 117,183.84 and 28,237.64 is: 42,331.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,169.28 : 117,183.84 = 28,237.64 : x
  2. Step 2: Convert to fraction form
    78,169.28/117,183.84 = 28,237.64/x
  3. Step 3: Cross multiply
    78,169.28x = 117,183.84 × 28,237.64
  4. Step 4: Simplify right side
    78,169.28x = 3,308,995,087.74
  5. Step 5: Solve for x
    x = 3,308,995,087.74/78,169.28
  6. Step 6: Final answer
    x = 42,331.14

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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.