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Finding the Fourth Proportional to 68,238.90, 102,372.12 and 28,795.86

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Solution

The fourth proportional to 68,238.90, 102,372.12 and 28,795.86 is: 43,199.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,238.90 : 102,372.12 = 28,795.86 : x
  2. Step 2: Convert to fraction form
    68,238.90/102,372.12 = 28,795.86/x
  3. Step 3: Cross multiply
    68,238.90x = 102,372.12 × 28,795.86
  4. Step 4: Simplify right side
    68,238.90x = 2,947,893,235.42
  5. Step 5: Solve for x
    x = 2,947,893,235.42/68,238.90
  6. Step 6: Final answer
    x = 43,199.60

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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.