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Finding the Fourth Proportional to 103,618.92, 155,412.91 and 28,731.24

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Solution

The fourth proportional to 103,618.92, 155,412.91 and 28,731.24 is: 43,092.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,618.92 : 155,412.91 = 28,731.24 : x
  2. Step 2: Convert to fraction form
    103,618.92/155,412.91 = 28,731.24/x
  3. Step 3: Cross multiply
    103,618.92x = 155,412.91 × 28,731.24
  4. Step 4: Simplify right side
    103,618.92x = 4,465,205,616.31
  5. Step 5: Solve for x
    x = 4,465,205,616.31/103,618.92
  6. Step 6: Final answer
    x = 43,092.57

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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.