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Finding the Fourth Proportional to 231,000.81, 318,786.35 and 135,576.33

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Solution

The fourth proportional to 231,000.81, 318,786.35 and 135,576.33 is: 187,098.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,000.81 : 318,786.35 = 135,576.33 : x
  2. Step 2: Convert to fraction form
    231,000.81/318,786.35 = 135,576.33/x
  3. Step 3: Cross multiply
    231,000.81x = 318,786.35 × 135,576.33
  4. Step 4: Simplify right side
    231,000.81x = 43,219,882,709.21
  5. Step 5: Solve for x
    x = 43,219,882,709.21/231,000.81
  6. Step 6: Final answer
    x = 187,098.40

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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.