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Finding the Fourth Proportional to 156,989.94, 235,479.64 and 68,243.44

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Solution

The fourth proportional to 156,989.94, 235,479.64 and 68,243.44 is: 102,362.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,989.94 : 235,479.64 = 68,243.44 : x
  2. Step 2: Convert to fraction form
    156,989.94/235,479.64 = 68,243.44/x
  3. Step 3: Cross multiply
    156,989.94x = 235,479.64 × 68,243.44
  4. Step 4: Simplify right side
    156,989.94x = 16,069,940,683.56
  5. Step 5: Solve for x
    x = 16,069,940,683.56/156,989.94
  6. Step 6: Final answer
    x = 102,362.87

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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.