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Finding the Fourth Proportional to 79,515.57, 109,720.88 and 49,289.92

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Solution

The fourth proportional to 79,515.57, 109,720.88 and 49,289.92 is: 68,013.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,515.57 : 109,720.88 = 49,289.92 : x
  2. Step 2: Convert to fraction form
    79,515.57/109,720.88 = 49,289.92/x
  3. Step 3: Cross multiply
    79,515.57x = 109,720.88 × 49,289.92
  4. Step 4: Simplify right side
    79,515.57x = 5,408,133,061.62
  5. Step 5: Solve for x
    x = 5,408,133,061.62/79,515.57
  6. Step 6: Final answer
    x = 68,013.51

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.