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Finding the Fourth Proportional to 136,707.84, 188,675.84 and 80,137.60

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Solution

The fourth proportional to 136,707.84, 188,675.84 and 80,137.60 is: 110,601.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,707.84 : 188,675.84 = 80,137.60 : x
  2. Step 2: Convert to fraction form
    136,707.84/188,675.84 = 80,137.60/x
  3. Step 3: Cross multiply
    136,707.84x = 188,675.84 × 80,137.60
  4. Step 4: Simplify right side
    136,707.84x = 15,120,028,995.58
  5. Step 5: Solve for x
    x = 15,120,028,995.58/136,707.84
  6. Step 6: Final answer
    x = 110,601.04

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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.