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Finding the Fourth Proportional to 72,989.70, 109,265.85 and 43,392.30

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Solution

The fourth proportional to 72,989.70, 109,265.85 and 43,392.30 is: 64,958.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,989.70 : 109,265.85 = 43,392.30 : x
  2. Step 2: Convert to fraction form
    72,989.70/109,265.85 = 43,392.30/x
  3. Step 3: Cross multiply
    72,989.70x = 109,265.85 × 43,392.30
  4. Step 4: Simplify right side
    72,989.70x = 4,741,296,542.96
  5. Step 5: Solve for x
    x = 4,741,296,542.96/72,989.70
  6. Step 6: Final answer
    x = 64,958.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.