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Finding the Fourth Proportional to 79,539.96, 109,765.20 and 43,730.58

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Solution

The fourth proportional to 79,539.96, 109,765.20 and 43,730.58 is: 60,348.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,539.96 : 109,765.20 = 43,730.58 : x
  2. Step 2: Convert to fraction form
    79,539.96/109,765.20 = 43,730.58/x
  3. Step 3: Cross multiply
    79,539.96x = 109,765.20 × 43,730.58
  4. Step 4: Simplify right side
    79,539.96x = 4,800,095,859.82
  5. Step 5: Solve for x
    x = 4,800,095,859.82/79,539.96
  6. Step 6: Final answer
    x = 60,348.23

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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.