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Finding the Fourth Proportional to 156,419.85, 215,860.50 and 84,801

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Solution

The fourth proportional to 156,419.85, 215,860.50 and 84,801 is: 117,025.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,419.85 : 215,860.50 = 84,801 : x
  2. Step 2: Convert to fraction form
    156,419.85/215,860.50 = 84,801/x
  3. Step 3: Cross multiply
    156,419.85x = 215,860.50 × 84,801
  4. Step 4: Simplify right side
    156,419.85x = 18,305,186,260.50
  5. Step 5: Solve for x
    x = 18,305,186,260.50/156,419.85
  6. Step 6: Final answer
    x = 117,025.98

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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.