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Finding the Fourth Proportional to 192,686.60, 288,986.70 and 126,590.60

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Solution

The fourth proportional to 192,686.60, 288,986.70 and 126,590.60 is: 189,857.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,686.60 : 288,986.70 = 126,590.60 : x
  2. Step 2: Convert to fraction form
    192,686.60/288,986.70 = 126,590.60/x
  3. Step 3: Cross multiply
    192,686.60x = 288,986.70 × 126,590.60
  4. Step 4: Simplify right side
    192,686.60x = 36,582,999,745.02
  5. Step 5: Solve for x
    x = 36,582,999,745.02/192,686.60
  6. Step 6: Final answer
    x = 189,857.52

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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.