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Finding the Fourth Proportional to 79,728.03, 109,982.46 and 47,439.72

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Solution

The fourth proportional to 79,728.03, 109,982.46 and 47,439.72 is: 65,441.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,728.03 : 109,982.46 = 47,439.72 : x
  2. Step 2: Convert to fraction form
    79,728.03/109,982.46 = 47,439.72/x
  3. Step 3: Cross multiply
    79,728.03x = 109,982.46 × 47,439.72
  4. Step 4: Simplify right side
    79,728.03x = 5,217,537,107.31
  5. Step 5: Solve for x
    x = 5,217,537,107.31/79,728.03
  6. Step 6: Final answer
    x = 65,441.69

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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.