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Finding the Fourth Proportional to 103,857.88, 155,780.60 and 28,982.28

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Solution

The fourth proportional to 103,857.88, 155,780.60 and 28,982.28 is: 43,471.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,857.88 : 155,780.60 = 28,982.28 : x
  2. Step 2: Convert to fraction form
    103,857.88/155,780.60 = 28,982.28/x
  3. Step 3: Cross multiply
    103,857.88x = 155,780.60 × 28,982.28
  4. Step 4: Simplify right side
    103,857.88x = 4,514,876,967.77
  5. Step 5: Solve for x
    x = 4,514,876,967.77/103,857.88
  6. Step 6: Final answer
    x = 43,471.68

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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.