Home / 76,825.20-115,237.80-68,660.40

Finding the Fourth Proportional to 76,825.20, 115,237.80 and 68,660.40

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Solution

The fourth proportional to 76,825.20, 115,237.80 and 68,660.40 is: 102,990.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,825.20 : 115,237.80 = 68,660.40 : x
  2. Step 2: Convert to fraction form
    76,825.20/115,237.80 = 68,660.40/x
  3. Step 3: Cross multiply
    76,825.20x = 115,237.80 × 68,660.40
  4. Step 4: Simplify right side
    76,825.20x = 7,912,273,443.12
  5. Step 5: Solve for x
    x = 7,912,273,443.12/76,825.20
  6. Step 6: Final answer
    x = 102,990.60

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1.5x scale

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.