Home / 128,819.40-193,221-40,066.08

Finding the Fourth Proportional to 128,819.40, 193,221 and 40,066.08

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Solution

The fourth proportional to 128,819.40, 193,221 and 40,066.08 is: 60,096.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,819.40 : 193,221 = 40,066.08 : x
  2. Step 2: Convert to fraction form
    128,819.40/193,221 = 40,066.08/x
  3. Step 3: Cross multiply
    128,819.40x = 193,221 × 40,066.08
  4. Step 4: Simplify right side
    128,819.40x = 7,741,608,043.68
  5. Step 5: Solve for x
    x = 7,741,608,043.68/128,819.40
  6. Step 6: Final answer
    x = 60,096.60

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Why These Related Problems?

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