Home / 128,736.72-193,035.96-45,619.92

Finding the Fourth Proportional to 128,736.72, 193,035.96 and 45,619.92

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Solution

The fourth proportional to 128,736.72, 193,035.96 and 45,619.92 is: 68,405.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,736.72 : 193,035.96 = 45,619.92 : x
  2. Step 2: Convert to fraction form
    128,736.72/193,035.96 = 45,619.92/x
  3. Step 3: Cross multiply
    128,736.72x = 193,035.96 × 45,619.92
  4. Step 4: Simplify right side
    128,736.72x = 8,806,285,052.32
  5. Step 5: Solve for x
    x = 8,806,285,052.32/128,736.72
  6. Step 6: Final answer
    x = 68,405.39

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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.