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Finding the Fourth Proportional to 79,469.28, 109,660.80 and 45,478.08

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Solution

The fourth proportional to 79,469.28, 109,660.80 and 45,478.08 is: 62,755.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,469.28 : 109,660.80 = 45,478.08 : x
  2. Step 2: Convert to fraction form
    79,469.28/109,660.80 = 45,478.08/x
  3. Step 3: Cross multiply
    79,469.28x = 109,660.80 × 45,478.08
  4. Step 4: Simplify right side
    79,469.28x = 4,987,162,635.26
  5. Step 5: Solve for x
    x = 4,987,162,635.26/79,469.28
  6. Step 6: Final answer
    x = 62,755.86

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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.