Home / 128,965.86-193,419.83-54,170.46

Finding the Fourth Proportional to 128,965.86, 193,419.83 and 54,170.46

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Solution

The fourth proportional to 128,965.86, 193,419.83 and 54,170.46 is: 81,243.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,965.86 : 193,419.83 = 54,170.46 : x
  2. Step 2: Convert to fraction form
    128,965.86/193,419.83 = 54,170.46/x
  3. Step 3: Cross multiply
    128,965.86x = 193,419.83 × 54,170.46
  4. Step 4: Simplify right side
    128,965.86x = 10,477,641,299.65
  5. Step 5: Solve for x
    x = 10,477,641,299.65/128,965.86
  6. Step 6: Final answer
    x = 81,243.53

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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.