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Finding the Fourth Proportional to 103,805.54, 155,708.41 and 28,925.90

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Solution

The fourth proportional to 103,805.54, 155,708.41 and 28,925.90 is: 43,388.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,805.54 : 155,708.41 = 28,925.90 : x
  2. Step 2: Convert to fraction form
    103,805.54/155,708.41 = 28,925.90/x
  3. Step 3: Cross multiply
    103,805.54x = 155,708.41 × 28,925.90
  4. Step 4: Simplify right side
    103,805.54x = 4,504,005,896.82
  5. Step 5: Solve for x
    x = 4,504,005,896.82/103,805.54
  6. Step 6: Final answer
    x = 43,388.88

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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.