Home / 78,882.12-118,257.78-31,467.96

Finding the Fourth Proportional to 78,882.12, 118,257.78 and 31,467.96

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Solution

The fourth proportional to 78,882.12, 118,257.78 and 31,467.96 is: 47,175.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,882.12 : 118,257.78 = 31,467.96 : x
  2. Step 2: Convert to fraction form
    78,882.12/118,257.78 = 31,467.96/x
  3. Step 3: Cross multiply
    78,882.12x = 118,257.78 × 31,467.96
  4. Step 4: Simplify right side
    78,882.12x = 3,721,331,090.73
  5. Step 5: Solve for x
    x = 3,721,331,090.73/78,882.12
  6. Step 6: Final answer
    x = 47,175.85

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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.