Home / 135,623.10-187,121.90-79,023.54

Finding the Fourth Proportional to 135,623.10, 187,121.90 and 79,023.54

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Solution

The fourth proportional to 135,623.10, 187,121.90 and 79,023.54 is: 109,030.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,623.10 : 187,121.90 = 79,023.54 : x
  2. Step 2: Convert to fraction form
    135,623.10/187,121.90 = 79,023.54/x
  3. Step 3: Cross multiply
    135,623.10x = 187,121.90 × 79,023.54
  4. Step 4: Simplify right side
    135,623.10x = 14,787,035,147.08
  5. Step 5: Solve for x
    x = 14,787,035,147.08/135,623.10
  6. Step 6: Final answer
    x = 109,030.36

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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.