Home / 78,719.36-118,079.58-28,778.92

Finding the Fourth Proportional to 78,719.36, 118,079.58 and 28,778.92

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Solution

The fourth proportional to 78,719.36, 118,079.58 and 28,778.92 is: 43,168.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,719.36 : 118,079.58 = 28,778.92 : x
  2. Step 2: Convert to fraction form
    78,719.36/118,079.58 = 28,778.92/x
  3. Step 3: Cross multiply
    78,719.36x = 118,079.58 × 28,778.92
  4. Step 4: Simplify right side
    78,719.36x = 3,398,202,786.45
  5. Step 5: Solve for x
    x = 3,398,202,786.45/78,719.36
  6. Step 6: Final answer
    x = 43,168.58

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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.