Home / 76,938.80-115,338.54-30,179.12

Finding the Fourth Proportional to 76,938.80, 115,338.54 and 30,179.12

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Solution

The fourth proportional to 76,938.80, 115,338.54 and 30,179.12 is: 45,241.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,938.80 : 115,338.54 = 30,179.12 : x
  2. Step 2: Convert to fraction form
    76,938.80/115,338.54 = 30,179.12/x
  3. Step 3: Cross multiply
    76,938.80x = 115,338.54 × 30,179.12
  4. Step 4: Simplify right side
    76,938.80x = 3,480,815,639.28
  5. Step 5: Solve for x
    x = 3,480,815,639.28/76,938.80
  6. Step 6: Final answer
    x = 45,241.36

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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.