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Finding the Fourth Proportional to 156,989.84, 235,611.30 and 72,843.80

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Solution

The fourth proportional to 156,989.84, 235,611.30 and 72,843.80 is: 109,324.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,989.84 : 235,611.30 = 72,843.80 : x
  2. Step 2: Convert to fraction form
    156,989.84/235,611.30 = 72,843.80/x
  3. Step 3: Cross multiply
    156,989.84x = 235,611.30 × 72,843.80
  4. Step 4: Simplify right side
    156,989.84x = 17,162,822,414.94
  5. Step 5: Solve for x
    x = 17,162,822,414.94/156,989.84
  6. Step 6: Final answer
    x = 109,324.41

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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.