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Finding the Fourth Proportional to 156,327.28, 215,731.28 and 84,709.28

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Solution

The fourth proportional to 156,327.28, 215,731.28 and 84,709.28 is: 116,898.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,327.28 : 215,731.28 = 84,709.28 : x
  2. Step 2: Convert to fraction form
    156,327.28/215,731.28 = 84,709.28/x
  3. Step 3: Cross multiply
    156,327.28x = 215,731.28 × 84,709.28
  4. Step 4: Simplify right side
    156,327.28x = 18,274,441,402.28
  5. Step 5: Solve for x
    x = 18,274,441,402.28/156,327.28
  6. Step 6: Final answer
    x = 116,898.61

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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.