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Finding the Fourth Proportional to 68,739.20, 103,060.20 and 31,317.20

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Solution

The fourth proportional to 68,739.20, 103,060.20 and 31,317.20 is: 46,953.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,739.20 : 103,060.20 = 31,317.20 : x
  2. Step 2: Convert to fraction form
    68,739.20/103,060.20 = 31,317.20/x
  3. Step 3: Cross multiply
    68,739.20x = 103,060.20 × 31,317.20
  4. Step 4: Simplify right side
    68,739.20x = 3,227,556,895.44
  5. Step 5: Solve for x
    x = 3,227,556,895.44/68,739.20
  6. Step 6: Final answer
    x = 46,953.66

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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.