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Finding the Fourth Proportional to 156,476.25, 215,908.32 and 91,956

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Solution

The fourth proportional to 156,476.25, 215,908.32 and 91,956 is: 126,882.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,476.25 : 215,908.32 = 91,956 : x
  2. Step 2: Convert to fraction form
    156,476.25/215,908.32 = 91,956/x
  3. Step 3: Cross multiply
    156,476.25x = 215,908.32 × 91,956
  4. Step 4: Simplify right side
    156,476.25x = 19,854,065,473.92
  5. Step 5: Solve for x
    x = 19,854,065,473.92/156,476.25
  6. Step 6: Final answer
    x = 126,882.29

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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.