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Finding the Fourth Proportional to 159,358.76, 219,927.78 and 91,381.96

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Solution

The fourth proportional to 159,358.76, 219,927.78 and 91,381.96 is: 126,114.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,358.76 : 219,927.78 = 91,381.96 : x
  2. Step 2: Convert to fraction form
    159,358.76/219,927.78 = 91,381.96/x
  3. Step 3: Cross multiply
    159,358.76x = 219,927.78 × 91,381.96
  4. Step 4: Simplify right side
    159,358.76x = 20,097,431,594.85
  5. Step 5: Solve for x
    x = 20,097,431,594.85/159,358.76
  6. Step 6: Final answer
    x = 126,114.38

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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.