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Finding the Fourth Proportional to 136,881.56, 188,898 and 80,293.88

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Solution

The fourth proportional to 136,881.56, 188,898 and 80,293.88 is: 110,806.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,881.56 : 188,898 = 80,293.88 : x
  2. Step 2: Convert to fraction form
    136,881.56/188,898 = 80,293.88/x
  3. Step 3: Cross multiply
    136,881.56x = 188,898 × 80,293.88
  4. Step 4: Simplify right side
    136,881.56x = 15,167,353,344.24
  5. Step 5: Solve for x
    x = 15,167,353,344.24/136,881.56
  6. Step 6: Final answer
    x = 110,806.40

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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.