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Finding the Fourth Proportional to 66,251.36, 99,412.72 and 51,489.92

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Solution

The fourth proportional to 66,251.36, 99,412.72 and 51,489.92 is: 77,262.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,251.36 : 99,412.72 = 51,489.92 : x
  2. Step 2: Convert to fraction form
    66,251.36/99,412.72 = 51,489.92/x
  3. Step 3: Cross multiply
    66,251.36x = 99,412.72 × 51,489.92
  4. Step 4: Simplify right side
    66,251.36x = 5,118,752,999.78
  5. Step 5: Solve for x
    x = 5,118,752,999.78/66,251.36
  6. Step 6: Final answer
    x = 77,262.61

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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.