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Finding the Fourth Proportional to 156,089.88, 215,404.02 and 84,469.91

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Solution

The fourth proportional to 156,089.88, 215,404.02 and 84,469.91 is: 116,568.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,089.88 : 215,404.02 = 84,469.91 : x
  2. Step 2: Convert to fraction form
    156,089.88/215,404.02 = 84,469.91/x
  3. Step 3: Cross multiply
    156,089.88x = 215,404.02 × 84,469.91
  4. Step 4: Simplify right side
    156,089.88x = 18,195,158,183.04
  5. Step 5: Solve for x
    x = 18,195,158,183.04/156,089.88
  6. Step 6: Final answer
    x = 116,568.47

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.