Home / 128,905.65-193,355.51-75,933.67

Finding the Fourth Proportional to 128,905.65, 193,355.51 and 75,933.67

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Solution

The fourth proportional to 128,905.65, 193,355.51 and 75,933.67 is: 113,898.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,905.65 : 193,355.51 = 75,933.67 : x
  2. Step 2: Convert to fraction form
    128,905.65/193,355.51 = 75,933.67/x
  3. Step 3: Cross multiply
    128,905.65x = 193,355.51 × 75,933.67
  4. Step 4: Simplify right side
    128,905.65x = 14,682,192,815.80
  5. Step 5: Solve for x
    x = 14,682,192,815.80/128,905.65
  6. Step 6: Final answer
    x = 113,898.75

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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.