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Finding the Fourth Proportional to 136,765.72, 188,736.90 and 76,336.34

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Solution

The fourth proportional to 136,765.72, 188,736.90 and 76,336.34 is: 105,344.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,765.72 : 188,736.90 = 76,336.34 : x
  2. Step 2: Convert to fraction form
    136,765.72/188,736.90 = 76,336.34/x
  3. Step 3: Cross multiply
    136,765.72x = 188,736.90 × 76,336.34
  4. Step 4: Simplify right side
    136,765.72x = 14,407,484,989.18
  5. Step 5: Solve for x
    x = 14,407,484,989.18/136,765.72
  6. Step 6: Final answer
    x = 105,344.27

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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.