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Finding the Fourth Proportional to 52,790.85, 79,130.79 and 19,489.68

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Solution

The fourth proportional to 52,790.85, 79,130.79 and 19,489.68 is: 29,214.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,790.85 : 79,130.79 = 19,489.68 : x
  2. Step 2: Convert to fraction form
    52,790.85/79,130.79 = 19,489.68/x
  3. Step 3: Cross multiply
    52,790.85x = 79,130.79 × 19,489.68
  4. Step 4: Simplify right side
    52,790.85x = 1,542,233,775.25
  5. Step 5: Solve for x
    x = 1,542,233,775.25/52,790.85
  6. Step 6: Final answer
    x = 29,214.04

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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.