Home / 78,537.44-117,855.36-31,790.31

Finding the Fourth Proportional to 78,537.44, 117,855.36 and 31,790.31

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Solution

The fourth proportional to 78,537.44, 117,855.36 and 31,790.31 is: 47,705.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,537.44 : 117,855.36 = 31,790.31 : x
  2. Step 2: Convert to fraction form
    78,537.44/117,855.36 = 31,790.31/x
  3. Step 3: Cross multiply
    78,537.44x = 117,855.36 × 31,790.31
  4. Step 4: Simplify right side
    78,537.44x = 3,746,658,429.56
  5. Step 5: Solve for x
    x = 3,746,658,429.56/78,537.44
  6. Step 6: Final answer
    x = 47,705.38

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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.