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Finding the Fourth Proportional to 79,673.68, 119,500.76 and 20,509.64

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Solution

The fourth proportional to 79,673.68, 119,500.76 and 20,509.64 is: 30,761.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,673.68 : 119,500.76 = 20,509.64 : x
  2. Step 2: Convert to fraction form
    79,673.68/119,500.76 = 20,509.64/x
  3. Step 3: Cross multiply
    79,673.68x = 119,500.76 × 20,509.64
  4. Step 4: Simplify right side
    79,673.68x = 2,450,917,567.33
  5. Step 5: Solve for x
    x = 2,450,917,567.33/79,673.68
  6. Step 6: Final answer
    x = 30,761.95

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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.