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Finding the Fourth Proportional to 68,507.58, 102,502.98 and 40,442.90

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Solution

The fourth proportional to 68,507.58, 102,502.98 and 40,442.90 is: 60,511.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,507.58 : 102,502.98 = 40,442.90 : x
  2. Step 2: Convert to fraction form
    68,507.58/102,502.98 = 40,442.90/x
  3. Step 3: Cross multiply
    68,507.58x = 102,502.98 × 40,442.90
  4. Step 4: Simplify right side
    68,507.58x = 4,145,517,567.63
  5. Step 5: Solve for x
    x = 4,145,517,567.63/68,507.58
  6. Step 6: Final answer
    x = 60,511.81

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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.