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Finding the Fourth Proportional to 103,289.59, 142,486.50 and 68,893.54

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Solution

The fourth proportional to 103,289.59, 142,486.50 and 68,893.54 is: 95,037.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,289.59 : 142,486.50 = 68,893.54 : x
  2. Step 2: Convert to fraction form
    103,289.59/142,486.50 = 68,893.54/x
  3. Step 3: Cross multiply
    103,289.59x = 142,486.50 × 68,893.54
  4. Step 4: Simplify right side
    103,289.59x = 9,816,399,387.21
  5. Step 5: Solve for x
    x = 9,816,399,387.21/103,289.59
  6. Step 6: Final answer
    x = 95,037.65

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.