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Finding the Fourth Proportional to 79,389, 119,084.40 and 26,080.20

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Solution

The fourth proportional to 79,389, 119,084.40 and 26,080.20 is: 39,120.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,389 : 119,084.40 = 26,080.20 : x
  2. Step 2: Convert to fraction form
    79,389/119,084.40 = 26,080.20/x
  3. Step 3: Cross multiply
    79,389x = 119,084.40 × 26,080.20
  4. Step 4: Simplify right side
    79,389x = 3,105,744,968.88
  5. Step 5: Solve for x
    x = 3,105,744,968.88/79,389
  6. Step 6: Final answer
    x = 39,120.60

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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.