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Finding the Fourth Proportional to 79,245, 109,361.34 and 45,711

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Solution

The fourth proportional to 79,245, 109,361.34 and 45,711 is: 63,083.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,245 : 109,361.34 = 45,711 : x
  2. Step 2: Convert to fraction form
    79,245/109,361.34 = 45,711/x
  3. Step 3: Cross multiply
    79,245x = 109,361.34 × 45,711
  4. Step 4: Simplify right side
    79,245x = 4,999,016,212.74
  5. Step 5: Solve for x
    x = 4,999,016,212.74/79,245
  6. Step 6: Final answer
    x = 63,083.05

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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.