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Finding the Fourth Proportional to 136,840.48, 188,840.72 and 80,252.96

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Solution

The fourth proportional to 136,840.48, 188,840.72 and 80,252.96 is: 110,749.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,840.48 : 188,840.72 = 80,252.96 : x
  2. Step 2: Convert to fraction form
    136,840.48/188,840.72 = 80,252.96/x
  3. Step 3: Cross multiply
    136,840.48x = 188,840.72 × 80,252.96
  4. Step 4: Simplify right side
    136,840.48x = 15,155,026,748.53
  5. Step 5: Solve for x
    x = 15,155,026,748.53/136,840.48
  6. Step 6: Final answer
    x = 110,749.59

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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.