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Finding the Fourth Proportional to 156,634.79, 234,914.55 and 72,313.97

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Solution

The fourth proportional to 156,634.79, 234,914.55 and 72,313.97 is: 108,453.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,634.79 : 234,914.55 = 72,313.97 : x
  2. Step 2: Convert to fraction form
    156,634.79/234,914.55 = 72,313.97/x
  3. Step 3: Cross multiply
    156,634.79x = 234,914.55 × 72,313.97
  4. Step 4: Simplify right side
    156,634.79x = 16,987,602,546.69
  5. Step 5: Solve for x
    x = 16,987,602,546.69/156,634.79
  6. Step 6: Final answer
    x = 108,453.57

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.