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Finding the Fourth Proportional to 80,573.72, 120,736.38 and 43,138.76

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Solution

The fourth proportional to 80,573.72, 120,736.38 and 43,138.76 is: 64,641.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,573.72 : 120,736.38 = 43,138.76 : x
  2. Step 2: Convert to fraction form
    80,573.72/120,736.38 = 43,138.76/x
  3. Step 3: Cross multiply
    80,573.72x = 120,736.38 × 43,138.76
  4. Step 4: Simplify right side
    80,573.72x = 5,208,417,720.09
  5. Step 5: Solve for x
    x = 5,208,417,720.09/80,573.72
  6. Step 6: Final answer
    x = 64,641.64

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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.