Home / 78,399.20-117,550.20-45,102.80

Finding the Fourth Proportional to 78,399.20, 117,550.20 and 45,102.80

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Solution

The fourth proportional to 78,399.20, 117,550.20 and 45,102.80 is: 67,626.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,399.20 : 117,550.20 = 45,102.80 : x
  2. Step 2: Convert to fraction form
    78,399.20/117,550.20 = 45,102.80/x
  3. Step 3: Cross multiply
    78,399.20x = 117,550.20 × 45,102.80
  4. Step 4: Simplify right side
    78,399.20x = 5,301,843,160.56
  5. Step 5: Solve for x
    x = 5,301,843,160.56/78,399.20
  6. Step 6: Final answer
    x = 67,626.24

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1.5x scale

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.