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Finding the Fourth Proportional to 78,876.90, 118,206.81 and 34,540.74

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Solution

The fourth proportional to 78,876.90, 118,206.81 and 34,540.74 is: 51,763.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,876.90 : 118,206.81 = 34,540.74 : x
  2. Step 2: Convert to fraction form
    78,876.90/118,206.81 = 34,540.74/x
  3. Step 3: Cross multiply
    78,876.90x = 118,206.81 × 34,540.74
  4. Step 4: Simplify right side
    78,876.90x = 4,082,950,690.44
  5. Step 5: Solve for x
    x = 4,082,950,690.44/78,876.90
  6. Step 6: Final answer
    x = 51,763.58

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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.