Home / 128,989.92-193,287.60-54,069.21

Finding the Fourth Proportional to 128,989.92, 193,287.60 and 54,069.21

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Solution

The fourth proportional to 128,989.92, 193,287.60 and 54,069.21 is: 81,021.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,989.92 : 193,287.60 = 54,069.21 : x
  2. Step 2: Convert to fraction form
    128,989.92/193,287.60 = 54,069.21/x
  3. Step 3: Cross multiply
    128,989.92x = 193,287.60 × 54,069.21
  4. Step 4: Simplify right side
    128,989.92x = 10,450,907,834.80
  5. Step 5: Solve for x
    x = 10,450,907,834.80/128,989.92
  6. Step 6: Final answer
    x = 81,021.12

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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.