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Finding the Fourth Proportional to 148,670.66, 205,165.61 and 80,687.61

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Solution

The fourth proportional to 148,670.66, 205,165.61 and 80,687.61 is: 111,348.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    148,670.66 : 205,165.61 = 80,687.61 : x
  2. Step 2: Convert to fraction form
    148,670.66/205,165.61 = 80,687.61/x
  3. Step 3: Cross multiply
    148,670.66x = 205,165.61 × 80,687.61
  4. Step 4: Simplify right side
    148,670.66x = 16,554,322,321.65
  5. Step 5: Solve for x
    x = 16,554,322,321.65/148,670.66
  6. Step 6: Final answer
    x = 111,348.96

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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.