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Finding the Fourth Proportional to 79,686.62, 109,958.39 and 45,685.75

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Solution

The fourth proportional to 79,686.62, 109,958.39 and 45,685.75 is: 63,041.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,686.62 : 109,958.39 = 45,685.75 : x
  2. Step 2: Convert to fraction form
    79,686.62/109,958.39 = 45,685.75/x
  3. Step 3: Cross multiply
    79,686.62x = 109,958.39 × 45,685.75
  4. Step 4: Simplify right side
    79,686.62x = 5,023,531,515.94
  5. Step 5: Solve for x
    x = 5,023,531,515.94/79,686.62
  6. Step 6: Final answer
    x = 63,041.09

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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.