Home / 112,369.44-154,985.76-78,379.68

Finding the Fourth Proportional to 112,369.44, 154,985.76 and 78,379.68

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Solution

The fourth proportional to 112,369.44, 154,985.76 and 78,379.68 is: 108,105.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,369.44 : 154,985.76 = 78,379.68 : x
  2. Step 2: Convert to fraction form
    112,369.44/154,985.76 = 78,379.68/x
  3. Step 3: Cross multiply
    112,369.44x = 154,985.76 × 78,379.68
  4. Step 4: Simplify right side
    112,369.44x = 12,147,734,273.36
  5. Step 5: Solve for x
    x = 12,147,734,273.36/112,369.44
  6. Step 6: Final answer
    x = 108,105.32

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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.