Home / 78,189.62-117,196.41-38,775.02

Finding the Fourth Proportional to 78,189.62, 117,196.41 and 38,775.02

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Solution

The fourth proportional to 78,189.62, 117,196.41 and 38,775.02 is: 58,118.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,189.62 : 117,196.41 = 38,775.02 : x
  2. Step 2: Convert to fraction form
    78,189.62/117,196.41 = 38,775.02/x
  3. Step 3: Cross multiply
    78,189.62x = 117,196.41 × 38,775.02
  4. Step 4: Simplify right side
    78,189.62x = 4,544,293,141.68
  5. Step 5: Solve for x
    x = 4,544,293,141.68/78,189.62
  6. Step 6: Final answer
    x = 58,118.88

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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.