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Finding the Fourth Proportional to 228,313.96, 315,106.69 and 131,499.21

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Solution

The fourth proportional to 228,313.96, 315,106.69 and 131,499.21 is: 181,488.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,313.96 : 315,106.69 = 131,499.21 : x
  2. Step 2: Convert to fraction form
    228,313.96/315,106.69 = 131,499.21/x
  3. Step 3: Cross multiply
    228,313.96x = 315,106.69 × 131,499.21
  4. Step 4: Simplify right side
    228,313.96x = 41,436,279,783.44
  5. Step 5: Solve for x
    x = 41,436,279,783.44/228,313.96
  6. Step 6: Final answer
    x = 181,488.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.