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Finding the Fourth Proportional to 68,777.16, 103,158.83 and 18,862.28

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Solution

The fourth proportional to 68,777.16, 103,158.83 and 18,862.28 is: 28,291.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,777.16 : 103,158.83 = 18,862.28 : x
  2. Step 2: Convert to fraction form
    68,777.16/103,158.83 = 18,862.28/x
  3. Step 3: Cross multiply
    68,777.16x = 103,158.83 × 18,862.28
  4. Step 4: Simplify right side
    68,777.16x = 1,945,810,735.93
  5. Step 5: Solve for x
    x = 1,945,810,735.93/68,777.16
  6. Step 6: Final answer
    x = 28,291.52

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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.