Home / 78,144.14-117,021.80-54,660.62

Finding the Fourth Proportional to 78,144.14, 117,021.80 and 54,660.62

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Solution

The fourth proportional to 78,144.14, 117,021.80 and 54,660.62 is: 81,854.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,144.14 : 117,021.80 = 54,660.62 : x
  2. Step 2: Convert to fraction form
    78,144.14/117,021.80 = 54,660.62/x
  3. Step 3: Cross multiply
    78,144.14x = 117,021.80 × 54,660.62
  4. Step 4: Simplify right side
    78,144.14x = 6,396,484,141.52
  5. Step 5: Solve for x
    x = 6,396,484,141.52/78,144.14
  6. Step 6: Final answer
    x = 81,854.94

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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.