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Finding the Fourth Proportional to 139,856.53, 209,850.41 and 69,741.31

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Solution

The fourth proportional to 139,856.53, 209,850.41 and 69,741.31 is: 104,644.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,856.53 : 209,850.41 = 69,741.31 : x
  2. Step 2: Convert to fraction form
    139,856.53/209,850.41 = 69,741.31/x
  3. Step 3: Cross multiply
    139,856.53x = 209,850.41 × 69,741.31
  4. Step 4: Simplify right side
    139,856.53x = 14,635,242,497.44
  5. Step 5: Solve for x
    x = 14,635,242,497.44/139,856.53
  6. Step 6: Final answer
    x = 104,644.68

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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.