Home / 79,711.04-109,204.60-76,721.60

Finding the Fourth Proportional to 79,711.04, 109,204.60 and 76,721.60

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Solution

The fourth proportional to 79,711.04, 109,204.60 and 76,721.60 is: 105,109.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,711.04 : 109,204.60 = 76,721.60 : x
  2. Step 2: Convert to fraction form
    79,711.04/109,204.60 = 76,721.60/x
  3. Step 3: Cross multiply
    79,711.04x = 109,204.60 × 76,721.60
  4. Step 4: Simplify right side
    79,711.04x = 8,378,351,639.36
  5. Step 5: Solve for x
    x = 8,378,351,639.36/79,711.04
  6. Step 6: Final answer
    x = 105,109.05

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.