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Finding the Fourth Proportional to 115,838.37, 159,876.06 and 79,509.96

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Solution

The fourth proportional to 115,838.37, 159,876.06 and 79,509.96 is: 109,736.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,838.37 : 159,876.06 = 79,509.96 : x
  2. Step 2: Convert to fraction form
    115,838.37/159,876.06 = 79,509.96/x
  3. Step 3: Cross multiply
    115,838.37x = 159,876.06 × 79,509.96
  4. Step 4: Simplify right side
    115,838.37x = 12,711,739,135.56
  5. Step 5: Solve for x
    x = 12,711,739,135.56/115,838.37
  6. Step 6: Final answer
    x = 109,736.86

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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.