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Finding the Fourth Proportional to 68,137.70, 102,210.64 and 28,697.88

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Solution

The fourth proportional to 68,137.70, 102,210.64 and 28,697.88 is: 43,048.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,137.70 : 102,210.64 = 28,697.88 : x
  2. Step 2: Convert to fraction form
    68,137.70/102,210.64 = 28,697.88/x
  3. Step 3: Cross multiply
    68,137.70x = 102,210.64 × 28,697.88
  4. Step 4: Simplify right side
    68,137.70x = 2,933,228,681.44
  5. Step 5: Solve for x
    x = 2,933,228,681.44/68,137.70
  6. Step 6: Final answer
    x = 43,048.55

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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.