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Finding the Fourth Proportional to 128,978.48, 193,462.68 and 35,481.68

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Solution

The fourth proportional to 128,978.48, 193,462.68 and 35,481.68 is: 53,221.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,978.48 : 193,462.68 = 35,481.68 : x
  2. Step 2: Convert to fraction form
    128,978.48/193,462.68 = 35,481.68/x
  3. Step 3: Cross multiply
    128,978.48x = 193,462.68 × 35,481.68
  4. Step 4: Simplify right side
    128,978.48x = 6,864,380,903.70
  5. Step 5: Solve for x
    x = 6,864,380,903.70/128,978.48
  6. Step 6: Final answer
    x = 53,221.13

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.