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Finding the Fourth Proportional to 78,804.84, 118,103.11 and 28,836.83

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Solution

The fourth proportional to 78,804.84, 118,103.11 and 28,836.83 is: 43,217.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,804.84 : 118,103.11 = 28,836.83 : x
  2. Step 2: Convert to fraction form
    78,804.84/118,103.11 = 28,836.83/x
  3. Step 3: Cross multiply
    78,804.84x = 118,103.11 × 28,836.83
  4. Step 4: Simplify right side
    78,804.84x = 3,405,719,026.58
  5. Step 5: Solve for x
    x = 3,405,719,026.58/78,804.84
  6. Step 6: Final answer
    x = 43,217.13

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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.