Home / 76,939.80-115,340.04-30,180.12

Finding the Fourth Proportional to 76,939.80, 115,340.04 and 30,180.12

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Solution

The fourth proportional to 76,939.80, 115,340.04 and 30,180.12 is: 45,242.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,939.80 : 115,340.04 = 30,180.12 : x
  2. Step 2: Convert to fraction form
    76,939.80/115,340.04 = 30,180.12/x
  3. Step 3: Cross multiply
    76,939.80x = 115,340.04 × 30,180.12
  4. Step 4: Simplify right side
    76,939.80x = 3,480,976,248.00
  5. Step 5: Solve for x
    x = 3,480,976,248.00/76,939.80
  6. Step 6: Final answer
    x = 45,242.86

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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.