Home / 78,467.09-117,653.24-31,665.29

Finding the Fourth Proportional to 78,467.09, 117,653.24 and 31,665.29

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Solution

The fourth proportional to 78,467.09, 117,653.24 and 31,665.29 is: 47,478.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,467.09 : 117,653.24 = 31,665.29 : x
  2. Step 2: Convert to fraction form
    78,467.09/117,653.24 = 31,665.29/x
  3. Step 3: Cross multiply
    78,467.09x = 117,653.24 × 31,665.29
  4. Step 4: Simplify right side
    78,467.09x = 3,725,523,454.94
  5. Step 5: Solve for x
    x = 3,725,523,454.94/78,467.09
  6. Step 6: Final answer
    x = 47,478.81

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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.