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Finding the Fourth Proportional to 79,579.32, 109,782.54 and 47,692.86

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Solution

The fourth proportional to 79,579.32, 109,782.54 and 47,692.86 is: 65,794.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,579.32 : 109,782.54 = 47,692.86 : x
  2. Step 2: Convert to fraction form
    79,579.32/109,782.54 = 47,692.86/x
  3. Step 3: Cross multiply
    79,579.32x = 109,782.54 × 47,692.86
  4. Step 4: Simplify right side
    79,579.32x = 5,235,843,310.66
  5. Step 5: Solve for x
    x = 5,235,843,310.66/79,579.32
  6. Step 6: Final answer
    x = 65,794.02

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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.