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Finding the Fourth Proportional to 79,449.80, 119,271.90 and 78,866.60

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Solution

The fourth proportional to 79,449.80, 119,271.90 and 78,866.60 is: 118,396.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,449.80 : 119,271.90 = 78,866.60 : x
  2. Step 2: Convert to fraction form
    79,449.80/119,271.90 = 78,866.60/x
  3. Step 3: Cross multiply
    79,449.80x = 119,271.90 × 78,866.60
  4. Step 4: Simplify right side
    79,449.80x = 9,406,569,228.54
  5. Step 5: Solve for x
    x = 9,406,569,228.54/79,449.80
  6. Step 6: Final answer
    x = 118,396.39

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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.