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Finding the Fourth Proportional to 103,636.72, 155,437.68 and 28,764.47

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Solution

The fourth proportional to 103,636.72, 155,437.68 and 28,764.47 is: 43,141.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,636.72 : 155,437.68 = 28,764.47 : x
  2. Step 2: Convert to fraction form
    103,636.72/155,437.68 = 28,764.47/x
  3. Step 3: Cross multiply
    103,636.72x = 155,437.68 × 28,764.47
  4. Step 4: Simplify right side
    103,636.72x = 4,471,082,105.35
  5. Step 5: Solve for x
    x = 4,471,082,105.35/103,636.72
  6. Step 6: Final answer
    x = 43,141.87

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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.