Home / 76,830.11-115,203.39-34,660.80

Finding the Fourth Proportional to 76,830.11, 115,203.39 and 34,660.80

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Solution

The fourth proportional to 76,830.11, 115,203.39 and 34,660.80 is: 51,972.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,830.11 : 115,203.39 = 34,660.80 : x
  2. Step 2: Convert to fraction form
    76,830.11/115,203.39 = 34,660.80/x
  3. Step 3: Cross multiply
    76,830.11x = 115,203.39 × 34,660.80
  4. Step 4: Simplify right side
    76,830.11x = 3,993,041,660.11
  5. Step 5: Solve for x
    x = 3,993,041,660.11/76,830.11
  6. Step 6: Final answer
    x = 51,972.36

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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.