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Finding the Fourth Proportional to 79,687.62, 109,964.84 and 43,870.73

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Solution

The fourth proportional to 79,687.62, 109,964.84 and 43,870.73 is: 60,539.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,687.62 : 109,964.84 = 43,870.73 : x
  2. Step 2: Convert to fraction form
    79,687.62/109,964.84 = 43,870.73/x
  3. Step 3: Cross multiply
    79,687.62x = 109,964.84 × 43,870.73
  4. Step 4: Simplify right side
    79,687.62x = 4,824,237,035.96
  5. Step 5: Solve for x
    x = 4,824,237,035.96/79,687.62
  6. Step 6: Final answer
    x = 60,539.35

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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.