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Finding the Fourth Proportional to 122,379.61, 183,624.50 and 66,153.89

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Solution

The fourth proportional to 122,379.61, 183,624.50 and 66,153.89 is: 99,260.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,379.61 : 183,624.50 = 66,153.89 : x
  2. Step 2: Convert to fraction form
    122,379.61/183,624.50 = 66,153.89/x
  3. Step 3: Cross multiply
    122,379.61x = 183,624.50 × 66,153.89
  4. Step 4: Simplify right side
    122,379.61x = 12,147,474,974.31
  5. Step 5: Solve for x
    x = 12,147,474,974.31/122,379.61
  6. Step 6: Final answer
    x = 99,260.61

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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.