Home / 79,710.04-109,203.26-76,720.60

Finding the Fourth Proportional to 79,710.04, 109,203.26 and 76,720.60

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Solution

The fourth proportional to 79,710.04, 109,203.26 and 76,720.60 is: 105,107.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,710.04 : 109,203.26 = 76,720.60 : x
  2. Step 2: Convert to fraction form
    79,710.04/109,203.26 = 76,720.60/x
  3. Step 3: Cross multiply
    79,710.04x = 109,203.26 × 76,720.60
  4. Step 4: Simplify right side
    79,710.04x = 8,378,139,629.16
  5. Step 5: Solve for x
    x = 8,378,139,629.16/79,710.04
  6. Step 6: Final answer
    x = 105,107.71

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1.5x scale

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.