Home / 139,330.28-192,287.78-78,911.60

Finding the Fourth Proportional to 139,330.28, 192,287.78 and 78,911.60

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Solution

The fourth proportional to 139,330.28, 192,287.78 and 78,911.60 is: 108,904.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,330.28 : 192,287.78 = 78,911.60 : x
  2. Step 2: Convert to fraction form
    139,330.28/192,287.78 = 78,911.60/x
  3. Step 3: Cross multiply
    139,330.28x = 192,287.78 × 78,911.60
  4. Step 4: Simplify right side
    139,330.28x = 15,173,736,380.25
  5. Step 5: Solve for x
    x = 15,173,736,380.25/139,330.28
  6. Step 6: Final answer
    x = 108,904.80

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.