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Finding the Fourth Proportional to 219,163.41, 328,759.83 and 76,991.40

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Solution

The fourth proportional to 219,163.41, 328,759.83 and 76,991.40 is: 115,492.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,163.41 : 328,759.83 = 76,991.40 : x
  2. Step 2: Convert to fraction form
    219,163.41/328,759.83 = 76,991.40/x
  3. Step 3: Cross multiply
    219,163.41x = 328,759.83 × 76,991.40
  4. Step 4: Simplify right side
    219,163.41x = 25,311,679,575.46
  5. Step 5: Solve for x
    x = 25,311,679,575.46/219,163.41
  6. Step 6: Final answer
    x = 115,492.27

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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.