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Finding the Fourth Proportional to 79,309.65, 109,456.46 and 47,478.54

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Solution

The fourth proportional to 79,309.65, 109,456.46 and 47,478.54 is: 65,525.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,309.65 : 109,456.46 = 47,478.54 : x
  2. Step 2: Convert to fraction form
    79,309.65/109,456.46 = 47,478.54/x
  3. Step 3: Cross multiply
    79,309.65x = 109,456.46 × 47,478.54
  4. Step 4: Simplify right side
    79,309.65x = 5,196,832,129.69
  5. Step 5: Solve for x
    x = 5,196,832,129.69/79,309.65
  6. Step 6: Final answer
    x = 65,525.85

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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.