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Finding the Fourth Proportional to 79,540.80, 109,764.84 and 43,730.40

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Solution

The fourth proportional to 79,540.80, 109,764.84 and 43,730.40 is: 60,347.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,540.80 : 109,764.84 = 43,730.40 : x
  2. Step 2: Convert to fraction form
    79,540.80/109,764.84 = 43,730.40/x
  3. Step 3: Cross multiply
    79,540.80x = 109,764.84 × 43,730.40
  4. Step 4: Simplify right side
    79,540.80x = 4,800,060,359.14
  5. Step 5: Solve for x
    x = 4,800,060,359.14/79,540.80
  6. Step 6: Final answer
    x = 60,347.15

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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.