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Finding the Fourth Proportional to 98,682.70, 136,182.89 and 54,481.68

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Solution

The fourth proportional to 98,682.70, 136,182.89 and 54,481.68 is: 75,185.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,682.70 : 136,182.89 = 54,481.68 : x
  2. Step 2: Convert to fraction form
    98,682.70/136,182.89 = 54,481.68/x
  3. Step 3: Cross multiply
    98,682.70x = 136,182.89 × 54,481.68
  4. Step 4: Simplify right side
    98,682.70x = 7,419,472,770.66
  5. Step 5: Solve for x
    x = 7,419,472,770.66/98,682.70
  6. Step 6: Final answer
    x = 75,185.14

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1.5x scale

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.