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Finding the Fourth Proportional to 155,063.01, 213,992.12 and 87,091.95

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Solution

The fourth proportional to 155,063.01, 213,992.12 and 87,091.95 is: 120,189.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,063.01 : 213,992.12 = 87,091.95 : x
  2. Step 2: Convert to fraction form
    155,063.01/213,992.12 = 87,091.95/x
  3. Step 3: Cross multiply
    155,063.01x = 213,992.12 × 87,091.95
  4. Step 4: Simplify right side
    155,063.01x = 18,636,991,015.43
  5. Step 5: Solve for x
    x = 18,636,991,015.43/155,063.01
  6. Step 6: Final answer
    x = 120,189.79

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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.