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Finding the Fourth Proportional to 210,771.35, 315,935.59 and 130,809.16

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Solution

The fourth proportional to 210,771.35, 315,935.59 and 130,809.16 is: 196,076.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,771.35 : 315,935.59 = 130,809.16 : x
  2. Step 2: Convert to fraction form
    210,771.35/315,935.59 = 130,809.16/x
  3. Step 3: Cross multiply
    210,771.35x = 315,935.59 × 130,809.16
  4. Step 4: Simplify right side
    210,771.35x = 41,327,269,142.00
  5. Step 5: Solve for x
    x = 41,327,269,142.00/210,771.35
  6. Step 6: Final answer
    x = 196,076.31

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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.