Home / 128,845.81-193,286.94-40,108.28

Finding the Fourth Proportional to 128,845.81, 193,286.94 and 40,108.28

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Solution

The fourth proportional to 128,845.81, 193,286.94 and 40,108.28 is: 60,168.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,845.81 : 193,286.94 = 40,108.28 : x
  2. Step 2: Convert to fraction form
    128,845.81/193,286.94 = 40,108.28/x
  3. Step 3: Cross multiply
    128,845.81x = 193,286.94 × 40,108.28
  4. Step 4: Simplify right side
    128,845.81x = 7,752,406,709.86
  5. Step 5: Solve for x
    x = 7,752,406,709.86/128,845.81
  6. Step 6: Final answer
    x = 60,168.10

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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.