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Finding the Fourth Proportional to 219,373, 329,059.55 and 79,131.61

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Solution

The fourth proportional to 219,373, 329,059.55 and 79,131.61 is: 118,697.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,373 : 329,059.55 = 79,131.61 : x
  2. Step 2: Convert to fraction form
    219,373/329,059.55 = 79,131.61/x
  3. Step 3: Cross multiply
    219,373x = 329,059.55 × 79,131.61
  4. Step 4: Simplify right side
    219,373x = 26,039,011,977.38
  5. Step 5: Solve for x
    x = 26,039,011,977.38/219,373
  6. Step 6: Final answer
    x = 118,697.43

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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.