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Finding the Fourth Proportional to 79,315.92, 109,454.04 and 51,021.54

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Solution

The fourth proportional to 79,315.92, 109,454.04 and 51,021.54 is: 70,408.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,315.92 : 109,454.04 = 51,021.54 : x
  2. Step 2: Convert to fraction form
    79,315.92/109,454.04 = 51,021.54/x
  3. Step 3: Cross multiply
    79,315.92x = 109,454.04 × 51,021.54
  4. Step 4: Simplify right side
    79,315.92x = 5,584,513,680.02
  5. Step 5: Solve for x
    x = 5,584,513,680.02/79,315.92
  6. Step 6: Final answer
    x = 70,408.48

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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.