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Finding the Fourth Proportional to 156,354.72, 215,768.97 and 84,736.50

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Solution

The fourth proportional to 156,354.72, 215,768.97 and 84,736.50 is: 116,936.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,354.72 : 215,768.97 = 84,736.50 : x
  2. Step 2: Convert to fraction form
    156,354.72/215,768.97 = 84,736.50/x
  3. Step 3: Cross multiply
    156,354.72x = 215,768.97 × 84,736.50
  4. Step 4: Simplify right side
    156,354.72x = 18,283,507,326.41
  5. Step 5: Solve for x
    x = 18,283,507,326.41/156,354.72
  6. Step 6: Final answer
    x = 116,936.08

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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.