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Finding the Fourth Proportional to 103,632.90, 155,449.41 and 28,753.11

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Solution

The fourth proportional to 103,632.90, 155,449.41 and 28,753.11 is: 43,129.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,632.90 : 155,449.41 = 28,753.11 : x
  2. Step 2: Convert to fraction form
    103,632.90/155,449.41 = 28,753.11/x
  3. Step 3: Cross multiply
    103,632.90x = 155,449.41 × 28,753.11
  4. Step 4: Simplify right side
    103,632.90x = 4,469,653,985.17
  5. Step 5: Solve for x
    x = 4,469,653,985.17/103,632.90
  6. Step 6: Final answer
    x = 43,129.68

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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.