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Finding the Fourth Proportional to 68,758.48, 103,065.72 and 28,800.28

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Solution

The fourth proportional to 68,758.48, 103,065.72 and 28,800.28 is: 43,170.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,758.48 : 103,065.72 = 28,800.28 : x
  2. Step 2: Convert to fraction form
    68,758.48/103,065.72 = 28,800.28/x
  3. Step 3: Cross multiply
    68,758.48x = 103,065.72 × 28,800.28
  4. Step 4: Simplify right side
    68,758.48x = 2,968,321,594.40
  5. Step 5: Solve for x
    x = 2,968,321,594.40/68,758.48
  6. Step 6: Final answer
    x = 43,170.26

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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.