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Finding the Fourth Proportional to 156,091.88, 215,406.76 and 84,471.88

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Solution

The fourth proportional to 156,091.88, 215,406.76 and 84,471.88 is: 116,571.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,091.88 : 215,406.76 = 84,471.88 : x
  2. Step 2: Convert to fraction form
    156,091.88/215,406.76 = 84,471.88/x
  3. Step 3: Cross multiply
    156,091.88x = 215,406.76 × 84,471.88
  4. Step 4: Simplify right side
    156,091.88x = 18,195,813,981.91
  5. Step 5: Solve for x
    x = 18,195,813,981.91/156,091.88
  6. Step 6: Final answer
    x = 116,571.18

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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.