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Finding the Fourth Proportional to 71,396.90, 107,095.35 and 68,675.30

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Solution

The fourth proportional to 71,396.90, 107,095.35 and 68,675.30 is: 103,012.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,396.90 : 107,095.35 = 68,675.30 : x
  2. Step 2: Convert to fraction form
    71,396.90/107,095.35 = 68,675.30/x
  3. Step 3: Cross multiply
    71,396.90x = 107,095.35 × 68,675.30
  4. Step 4: Simplify right side
    71,396.90x = 7,354,805,289.86
  5. Step 5: Solve for x
    x = 7,354,805,289.86/71,396.90
  6. Step 6: Final answer
    x = 103,012.95

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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.