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Finding the Fourth Proportional to 136,343.81, 188,162.21 and 81,912.63

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Solution

The fourth proportional to 136,343.81, 188,162.21 and 81,912.63 is: 113,044.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,343.81 : 188,162.21 = 81,912.63 : x
  2. Step 2: Convert to fraction form
    136,343.81/188,162.21 = 81,912.63/x
  3. Step 3: Cross multiply
    136,343.81x = 188,162.21 × 81,912.63
  4. Step 4: Simplify right side
    136,343.81x = 15,412,861,487.71
  5. Step 5: Solve for x
    x = 15,412,861,487.71/136,343.81
  6. Step 6: Final answer
    x = 113,044.09

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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.