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Finding the Fourth Proportional to 78,396.85, 117,595.28 and 36,924.85

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Solution

The fourth proportional to 78,396.85, 117,595.28 and 36,924.85 is: 55,387.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,396.85 : 117,595.28 = 36,924.85 : x
  2. Step 2: Convert to fraction form
    78,396.85/117,595.28 = 36,924.85/x
  3. Step 3: Cross multiply
    78,396.85x = 117,595.28 × 36,924.85
  4. Step 4: Simplify right side
    78,396.85x = 4,342,187,890.08
  5. Step 5: Solve for x
    x = 4,342,187,890.08/78,396.85
  6. Step 6: Final answer
    x = 55,387.28

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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.