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Finding the Fourth Proportional to 68,777.93, 103,146.34 and 20,744.53

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Solution

The fourth proportional to 68,777.93, 103,146.34 and 20,744.53 is: 31,110.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,777.93 : 103,146.34 = 20,744.53 : x
  2. Step 2: Convert to fraction form
    68,777.93/103,146.34 = 20,744.53/x
  3. Step 3: Cross multiply
    68,777.93x = 103,146.34 × 20,744.53
  4. Step 4: Simplify right side
    68,777.93x = 2,139,721,725.07
  5. Step 5: Solve for x
    x = 2,139,721,725.07/68,777.93
  6. Step 6: Final answer
    x = 31,110.59

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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.