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Finding the Fourth Proportional to 156,100.87, 215,419.46 and 84,480.95

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Solution

The fourth proportional to 156,100.87, 215,419.46 and 84,480.95 is: 116,583.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,100.87 : 215,419.46 = 84,480.95 : x
  2. Step 2: Convert to fraction form
    156,100.87/215,419.46 = 84,480.95/x
  3. Step 3: Cross multiply
    156,100.87x = 215,419.46 × 84,480.95
  4. Step 4: Simplify right side
    156,100.87x = 18,198,840,629.29
  5. Step 5: Solve for x
    x = 18,198,840,629.29/156,100.87
  6. Step 6: Final answer
    x = 116,583.85

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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.