Home / 78,724.57-118,103.70-28,804.48

Finding the Fourth Proportional to 78,724.57, 118,103.70 and 28,804.48

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Solution

The fourth proportional to 78,724.57, 118,103.70 and 28,804.48 is: 43,212.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,724.57 : 118,103.70 = 28,804.48 : x
  2. Step 2: Convert to fraction form
    78,724.57/118,103.70 = 28,804.48/x
  3. Step 3: Cross multiply
    78,724.57x = 118,103.70 × 28,804.48
  4. Step 4: Simplify right side
    78,724.57x = 3,401,915,664.58
  5. Step 5: Solve for x
    x = 3,401,915,664.58/78,724.57
  6. Step 6: Final answer
    x = 43,212.88

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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.