Home / 78,716.62-118,043.61-28,785.34

Finding the Fourth Proportional to 78,716.62, 118,043.61 and 28,785.34

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Solution

The fourth proportional to 78,716.62, 118,043.61 and 28,785.34 is: 43,166.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,716.62 : 118,043.61 = 28,785.34 : x
  2. Step 2: Convert to fraction form
    78,716.62/118,043.61 = 28,785.34/x
  3. Step 3: Cross multiply
    78,716.62x = 118,043.61 × 28,785.34
  4. Step 4: Simplify right side
    78,716.62x = 3,397,925,448.68
  5. Step 5: Solve for x
    x = 3,397,925,448.68/78,716.62
  6. Step 6: Final answer
    x = 43,166.56

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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.