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Finding the Fourth Proportional to 79,485.58, 109,692.80 and 43,676.88

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Solution

The fourth proportional to 79,485.58, 109,692.80 and 43,676.88 is: 60,275.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,485.58 : 109,692.80 = 43,676.88 : x
  2. Step 2: Convert to fraction form
    79,485.58/109,692.80 = 43,676.88/x
  3. Step 3: Cross multiply
    79,485.58x = 109,692.80 × 43,676.88
  4. Step 4: Simplify right side
    79,485.58x = 4,791,039,262.46
  5. Step 5: Solve for x
    x = 4,791,039,262.46/79,485.58
  6. Step 6: Final answer
    x = 60,275.58

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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.