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Finding the Fourth Proportional to 136,765.17, 188,736.20 and 76,335.80

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Solution

The fourth proportional to 136,765.17, 188,736.20 and 76,335.80 is: 105,343.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,765.17 : 188,736.20 = 76,335.80 : x
  2. Step 2: Convert to fraction form
    136,765.17/188,736.20 = 76,335.80/x
  3. Step 3: Cross multiply
    136,765.17x = 188,736.20 × 76,335.80
  4. Step 4: Simplify right side
    136,765.17x = 14,407,327,490.60
  5. Step 5: Solve for x
    x = 14,407,327,490.60/136,765.17
  6. Step 6: Final answer
    x = 105,343.54

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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.