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Finding the Fourth Proportional to 156,404.96, 215,771.28 and 104,660

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Solution

The fourth proportional to 156,404.96, 215,771.28 and 104,660 is: 144,385.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,404.96 : 215,771.28 = 104,660 : x
  2. Step 2: Convert to fraction form
    156,404.96/215,771.28 = 104,660/x
  3. Step 3: Cross multiply
    156,404.96x = 215,771.28 × 104,660
  4. Step 4: Simplify right side
    156,404.96x = 22,582,622,164.80
  5. Step 5: Solve for x
    x = 22,582,622,164.80/156,404.96
  6. Step 6: Final answer
    x = 144,385.59

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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.