Home / 76,822.20-115,233.30-68,657.40

Finding the Fourth Proportional to 76,822.20, 115,233.30 and 68,657.40

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Solution

The fourth proportional to 76,822.20, 115,233.30 and 68,657.40 is: 102,986.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,822.20 : 115,233.30 = 68,657.40 : x
  2. Step 2: Convert to fraction form
    76,822.20/115,233.30 = 68,657.40/x
  3. Step 3: Cross multiply
    76,822.20x = 115,233.30 × 68,657.40
  4. Step 4: Simplify right side
    76,822.20x = 7,911,618,771.42
  5. Step 5: Solve for x
    x = 7,911,618,771.42/76,822.20
  6. Step 6: Final answer
    x = 102,986.10

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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.