Home / 76,923.40-115,449.90-30,209.80

Finding the Fourth Proportional to 76,923.40, 115,449.90 and 30,209.80

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Solution

The fourth proportional to 76,923.40, 115,449.90 and 30,209.80 is: 45,340.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,923.40 : 115,449.90 = 30,209.80 : x
  2. Step 2: Convert to fraction form
    76,923.40/115,449.90 = 30,209.80/x
  3. Step 3: Cross multiply
    76,923.40x = 115,449.90 × 30,209.80
  4. Step 4: Simplify right side
    76,923.40x = 3,487,718,389.02
  5. Step 5: Solve for x
    x = 3,487,718,389.02/76,923.40
  6. Step 6: Final answer
    x = 45,340.15

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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.