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Finding the Fourth Proportional to 115,578.62, 159,486.60 and 79,311.16

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Solution

The fourth proportional to 115,578.62, 159,486.60 and 79,311.16 is: 109,441.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,578.62 : 159,486.60 = 79,311.16 : x
  2. Step 2: Convert to fraction form
    115,578.62/159,486.60 = 79,311.16/x
  3. Step 3: Cross multiply
    115,578.62x = 159,486.60 × 79,311.16
  4. Step 4: Simplify right side
    115,578.62x = 12,649,067,250.46
  5. Step 5: Solve for x
    x = 12,649,067,250.46/115,578.62
  6. Step 6: Final answer
    x = 109,441.24

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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.