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Finding the Fourth Proportional to 68,929.50, 95,122.80 and 39,121.50

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Solution

The fourth proportional to 68,929.50, 95,122.80 and 39,121.50 is: 53,987.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,929.50 : 95,122.80 = 39,121.50 : x
  2. Step 2: Convert to fraction form
    68,929.50/95,122.80 = 39,121.50/x
  3. Step 3: Cross multiply
    68,929.50x = 95,122.80 × 39,121.50
  4. Step 4: Simplify right side
    68,929.50x = 3,721,346,620.20
  5. Step 5: Solve for x
    x = 3,721,346,620.20/68,929.50
  6. Step 6: Final answer
    x = 53,987.72

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.