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Finding the Fourth Proportional to 128,189.54, 176,950.22 and 96,450.70

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Solution

The fourth proportional to 128,189.54, 176,950.22 and 96,450.70 is: 133,138.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,189.54 : 176,950.22 = 96,450.70 : x
  2. Step 2: Convert to fraction form
    128,189.54/176,950.22 = 96,450.70/x
  3. Step 3: Cross multiply
    128,189.54x = 176,950.22 × 96,450.70
  4. Step 4: Simplify right side
    128,189.54x = 17,066,972,584.15
  5. Step 5: Solve for x
    x = 17,066,972,584.15/128,189.54
  6. Step 6: Final answer
    x = 133,138.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.