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Finding the Fourth Proportional to 79,509.87, 109,723.14 and 43,699.05

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Solution

The fourth proportional to 79,509.87, 109,723.14 and 43,699.05 is: 60,304.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,509.87 : 109,723.14 = 43,699.05 : x
  2. Step 2: Convert to fraction form
    79,509.87/109,723.14 = 43,699.05/x
  3. Step 3: Cross multiply
    79,509.87x = 109,723.14 × 43,699.05
  4. Step 4: Simplify right side
    79,509.87x = 4,794,796,981.02
  5. Step 5: Solve for x
    x = 4,794,796,981.02/79,509.87
  6. Step 6: Final answer
    x = 60,304.42

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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.