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Finding the Fourth Proportional to 103,894.86, 143,364.56 and 63,620.04

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Solution

The fourth proportional to 103,894.86, 143,364.56 and 63,620.04 is: 87,789.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,894.86 : 143,364.56 = 63,620.04 : x
  2. Step 2: Convert to fraction form
    103,894.86/143,364.56 = 63,620.04/x
  3. Step 3: Cross multiply
    103,894.86x = 143,364.56 × 63,620.04
  4. Step 4: Simplify right side
    103,894.86x = 9,120,858,723.68
  5. Step 5: Solve for x
    x = 9,120,858,723.68/103,894.86
  6. Step 6: Final answer
    x = 87,789.32

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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.