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Finding the Fourth Proportional to 80,612.62, 120,752.61 and 47,231.31

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Solution

The fourth proportional to 80,612.62, 120,752.61 and 47,231.31 is: 70,749.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,612.62 : 120,752.61 = 47,231.31 : x
  2. Step 2: Convert to fraction form
    80,612.62/120,752.61 = 47,231.31/x
  3. Step 3: Cross multiply
    80,612.62x = 120,752.61 × 47,231.31
  4. Step 4: Simplify right side
    80,612.62x = 5,703,303,956.22
  5. Step 5: Solve for x
    x = 5,703,303,956.22/80,612.62
  6. Step 6: Final answer
    x = 70,749.52

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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.