Home / 128,920.71-193,381.12-40,181.37

Finding the Fourth Proportional to 128,920.71, 193,381.12 and 40,181.37

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Solution

The fourth proportional to 128,920.71, 193,381.12 and 40,181.37 is: 60,272.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,920.71 : 193,381.12 = 40,181.37 : x
  2. Step 2: Convert to fraction form
    128,920.71/193,381.12 = 40,181.37/x
  3. Step 3: Cross multiply
    128,920.71x = 193,381.12 × 40,181.37
  4. Step 4: Simplify right side
    128,920.71x = 7,770,317,658.78
  5. Step 5: Solve for x
    x = 7,770,317,658.78/128,920.71
  6. Step 6: Final answer
    x = 60,272.07

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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.