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Finding the Fourth Proportional to 79,273.60, 109,315.90 and 55,391.56

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Solution

The fourth proportional to 79,273.60, 109,315.90 and 55,391.56 is: 76,383.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,273.60 : 109,315.90 = 55,391.56 : x
  2. Step 2: Convert to fraction form
    79,273.60/109,315.90 = 55,391.56/x
  3. Step 3: Cross multiply
    79,273.60x = 109,315.90 × 55,391.56
  4. Step 4: Simplify right side
    79,273.60x = 6,055,178,233.80
  5. Step 5: Solve for x
    x = 6,055,178,233.80/79,273.60
  6. Step 6: Final answer
    x = 76,383.29

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1.5x scale

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.