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Finding the Fourth Proportional to 103,855.67, 155,809.77 and 28,975.78

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Solution

The fourth proportional to 103,855.67, 155,809.77 and 28,975.78 is: 43,471.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,855.67 : 155,809.77 = 28,975.78 : x
  2. Step 2: Convert to fraction form
    103,855.67/155,809.77 = 28,975.78/x
  3. Step 3: Cross multiply
    103,855.67x = 155,809.77 × 28,975.78
  4. Step 4: Simplify right side
    103,855.67x = 4,514,709,472.49
  5. Step 5: Solve for x
    x = 4,514,709,472.49/103,855.67
  6. Step 6: Final answer
    x = 43,471.00

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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.