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Finding the Fourth Proportional to 141,990.60, 212,576.30 and 86,694.60

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Solution

The fourth proportional to 141,990.60, 212,576.30 and 86,694.60 is: 129,791.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,990.60 : 212,576.30 = 86,694.60 : x
  2. Step 2: Convert to fraction form
    141,990.60/212,576.30 = 86,694.60/x
  3. Step 3: Cross multiply
    141,990.60x = 212,576.30 × 86,694.60
  4. Step 4: Simplify right side
    141,990.60x = 18,429,217,297.98
  5. Step 5: Solve for x
    x = 18,429,217,297.98/141,990.60
  6. Step 6: Final answer
    x = 129,791.81

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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.