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Finding the Fourth Proportional to 52,636.96, 78,986.70 and 19,380.39

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Solution

The fourth proportional to 52,636.96, 78,986.70 and 19,380.39 is: 29,082.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,636.96 : 78,986.70 = 19,380.39 : x
  2. Step 2: Convert to fraction form
    52,636.96/78,986.70 = 19,380.39/x
  3. Step 3: Cross multiply
    52,636.96x = 78,986.70 × 19,380.39
  4. Step 4: Simplify right side
    52,636.96x = 1,530,793,050.81
  5. Step 5: Solve for x
    x = 1,530,793,050.81/52,636.96
  6. Step 6: Final answer
    x = 29,082.09

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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.