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Finding the Fourth Proportional to 102,664.80, 154,112.40 and 79,394.40

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Solution

The fourth proportional to 102,664.80, 154,112.40 and 79,394.40 is: 119,180.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,664.80 : 154,112.40 = 79,394.40 : x
  2. Step 2: Convert to fraction form
    102,664.80/154,112.40 = 79,394.40/x
  3. Step 3: Cross multiply
    102,664.80x = 154,112.40 × 79,394.40
  4. Step 4: Simplify right side
    102,664.80x = 12,235,661,530.56
  5. Step 5: Solve for x
    x = 12,235,661,530.56/102,664.80
  6. Step 6: Final answer
    x = 119,180.69

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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.