Home / 76,800.11-115,219.58-21,396.11

Finding the Fourth Proportional to 76,800.11, 115,219.58 and 21,396.11

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Solution

The fourth proportional to 76,800.11, 115,219.58 and 21,396.11 is: 32,099.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,800.11 : 115,219.58 = 21,396.11 : x
  2. Step 2: Convert to fraction form
    76,800.11/115,219.58 = 21,396.11/x
  3. Step 3: Cross multiply
    76,800.11x = 115,219.58 × 21,396.11
  4. Step 4: Simplify right side
    76,800.11x = 2,465,250,124.76
  5. Step 5: Solve for x
    x = 2,465,250,124.76/76,800.11
  6. Step 6: Final answer
    x = 32,099.57

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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.