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Finding the Fourth Proportional to 136,953.28, 188,978.16 and 80,344

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Solution

The fourth proportional to 136,953.28, 188,978.16 and 80,344 is: 110,864.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,953.28 : 188,978.16 = 80,344 : x
  2. Step 2: Convert to fraction form
    136,953.28/188,978.16 = 80,344/x
  3. Step 3: Cross multiply
    136,953.28x = 188,978.16 × 80,344
  4. Step 4: Simplify right side
    136,953.28x = 15,183,261,287.04
  5. Step 5: Solve for x
    x = 15,183,261,287.04/136,953.28
  6. Step 6: Final answer
    x = 110,864.53

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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.