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Finding the Fourth Proportional to 79,921, 119,887.26 and 30,673

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Solution

The fourth proportional to 79,921, 119,887.26 and 30,673 is: 46,011.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,921 : 119,887.26 = 30,673 : x
  2. Step 2: Convert to fraction form
    79,921/119,887.26 = 30,673/x
  3. Step 3: Cross multiply
    79,921x = 119,887.26 × 30,673
  4. Step 4: Simplify right side
    79,921x = 3,677,301,925.98
  5. Step 5: Solve for x
    x = 3,677,301,925.98/79,921
  6. Step 6: Final answer
    x = 46,011.71

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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.