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Finding the Fourth Proportional to 103,813.82, 155,720.79 and 28,935.91

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Solution

The fourth proportional to 103,813.82, 155,720.79 and 28,935.91 is: 43,403.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,813.82 : 155,720.79 = 28,935.91 : x
  2. Step 2: Convert to fraction form
    103,813.82/155,720.79 = 28,935.91/x
  3. Step 3: Cross multiply
    103,813.82x = 155,720.79 × 28,935.91
  4. Step 4: Simplify right side
    103,813.82x = 4,505,922,001.91
  5. Step 5: Solve for x
    x = 4,505,922,001.91/103,813.82
  6. Step 6: Final answer
    x = 43,403.87

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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.