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Finding the Fourth Proportional to 103,809.05, 155,713.67 and 28,929.41

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Solution

The fourth proportional to 103,809.05, 155,713.67 and 28,929.41 is: 43,394.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,809.05 : 155,713.67 = 28,929.41 : x
  2. Step 2: Convert to fraction form
    103,809.05/155,713.67 = 28,929.41/x
  3. Step 3: Cross multiply
    103,809.05x = 155,713.67 × 28,929.41
  4. Step 4: Simplify right side
    103,809.05x = 4,504,703,678.82
  5. Step 5: Solve for x
    x = 4,504,703,678.82/103,809.05
  6. Step 6: Final answer
    x = 43,394.13

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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.