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Finding the Fourth Proportional to 101,143.40, 151,715.10 and 67,879.40

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Solution

The fourth proportional to 101,143.40, 151,715.10 and 67,879.40 is: 101,819.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,143.40 : 151,715.10 = 67,879.40 : x
  2. Step 2: Convert to fraction form
    101,143.40/151,715.10 = 67,879.40/x
  3. Step 3: Cross multiply
    101,143.40x = 151,715.10 × 67,879.40
  4. Step 4: Simplify right side
    101,143.40x = 10,298,329,958.94
  5. Step 5: Solve for x
    x = 10,298,329,958.94/101,143.40
  6. Step 6: Final answer
    x = 101,819.10

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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.