Home / 79,739.04-109,243-76,749.60

Finding the Fourth Proportional to 79,739.04, 109,243 and 76,749.60

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Solution

The fourth proportional to 79,739.04, 109,243 and 76,749.60 is: 105,147.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,739.04 : 109,243 = 76,749.60 : x
  2. Step 2: Convert to fraction form
    79,739.04/109,243 = 76,749.60/x
  3. Step 3: Cross multiply
    79,739.04x = 109,243 × 76,749.60
  4. Step 4: Simplify right side
    79,739.04x = 8,384,356,552.80
  5. Step 5: Solve for x
    x = 8,384,356,552.80/79,739.04
  6. Step 6: Final answer
    x = 105,147.45

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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.