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Finding the Fourth Proportional to 49,779.72, 74,676.60 and 18,612

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Solution

The fourth proportional to 49,779.72, 74,676.60 and 18,612 is: 27,920.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    49,779.72 : 74,676.60 = 18,612 : x
  2. Step 2: Convert to fraction form
    49,779.72/74,676.60 = 18,612/x
  3. Step 3: Cross multiply
    49,779.72x = 74,676.60 × 18,612
  4. Step 4: Simplify right side
    49,779.72x = 1,389,880,879.20
  5. Step 5: Solve for x
    x = 1,389,880,879.20/49,779.72
  6. Step 6: Final answer
    x = 27,920.62

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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.