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Finding the Fourth Proportional to 145,954.63, 219,013.97 and 79,399.42

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Solution

The fourth proportional to 145,954.63, 219,013.97 and 79,399.42 is: 119,143.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,954.63 : 219,013.97 = 79,399.42 : x
  2. Step 2: Convert to fraction form
    145,954.63/219,013.97 = 79,399.42/x
  3. Step 3: Cross multiply
    145,954.63x = 219,013.97 × 79,399.42
  4. Step 4: Simplify right side
    145,954.63x = 17,389,581,245.37
  5. Step 5: Solve for x
    x = 17,389,581,245.37/145,954.63
  6. Step 6: Final answer
    x = 119,143.74

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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.