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Finding the Fourth Proportional to 79,788.80, 119,780.40 and 79,205.60

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Solution

The fourth proportional to 79,788.80, 119,780.40 and 79,205.60 is: 118,904.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,788.80 : 119,780.40 = 79,205.60 : x
  2. Step 2: Convert to fraction form
    79,788.80/119,780.40 = 79,205.60/x
  3. Step 3: Cross multiply
    79,788.80x = 119,780.40 × 79,205.60
  4. Step 4: Simplify right side
    79,788.80x = 9,487,278,450.24
  5. Step 5: Solve for x
    x = 9,487,278,450.24/79,788.80
  6. Step 6: Final answer
    x = 118,904.89

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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.