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Finding the Fourth Proportional to 79,858.80, 119,788.20 and 73,119.60

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Solution

The fourth proportional to 79,858.80, 119,788.20 and 73,119.60 is: 109,679.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,858.80 : 119,788.20 = 73,119.60 : x
  2. Step 2: Convert to fraction form
    79,858.80/119,788.20 = 73,119.60/x
  3. Step 3: Cross multiply
    79,858.80x = 119,788.20 × 73,119.60
  4. Step 4: Simplify right side
    79,858.80x = 8,758,865,268.72
  5. Step 5: Solve for x
    x = 8,758,865,268.72/79,858.80
  6. Step 6: Final answer
    x = 109,679.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.