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Finding the Fourth Proportional to 193,139.54, 289,696.60 and 66,750.38

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Solution

The fourth proportional to 193,139.54, 289,696.60 and 66,750.38 is: 100,121.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    193,139.54 : 289,696.60 = 66,750.38 : x
  2. Step 2: Convert to fraction form
    193,139.54/289,696.60 = 66,750.38/x
  3. Step 3: Cross multiply
    193,139.54x = 289,696.60 × 66,750.38
  4. Step 4: Simplify right side
    193,139.54x = 19,337,358,134.71
  5. Step 5: Solve for x
    x = 19,337,358,134.71/193,139.54
  6. Step 6: Final answer
    x = 100,121.18

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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.