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Finding the Fourth Proportional to 156,357.60, 215,760.24 and 91,819.92

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Solution

The fourth proportional to 156,357.60, 215,760.24 and 91,819.92 is: 126,703.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,357.60 : 215,760.24 = 91,819.92 : x
  2. Step 2: Convert to fraction form
    156,357.60/215,760.24 = 91,819.92/x
  3. Step 3: Cross multiply
    156,357.60x = 215,760.24 × 91,819.92
  4. Step 4: Simplify right side
    156,357.60x = 19,811,087,975.98
  5. Step 5: Solve for x
    x = 19,811,087,975.98/156,357.60
  6. Step 6: Final answer
    x = 126,703.71

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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.