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Finding the Fourth Proportional to 156,963.80, 235,240.90 and 72,714.20

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Solution

The fourth proportional to 156,963.80, 235,240.90 and 72,714.20 is: 108,976.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,963.80 : 235,240.90 = 72,714.20 : x
  2. Step 2: Convert to fraction form
    156,963.80/235,240.90 = 72,714.20/x
  3. Step 3: Cross multiply
    156,963.80x = 235,240.90 × 72,714.20
  4. Step 4: Simplify right side
    156,963.80x = 17,105,353,850.78
  5. Step 5: Solve for x
    x = 17,105,353,850.78/156,963.80
  6. Step 6: Final answer
    x = 108,976.43

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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.