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Finding the Fourth Proportional to 66,162.74, 99,243.95 and 28,717.96

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Solution

The fourth proportional to 66,162.74, 99,243.95 and 28,717.96 is: 43,076.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,162.74 : 99,243.95 = 28,717.96 : x
  2. Step 2: Convert to fraction form
    66,162.74/99,243.95 = 28,717.96/x
  3. Step 3: Cross multiply
    66,162.74x = 99,243.95 × 28,717.96
  4. Step 4: Simplify right side
    66,162.74x = 2,850,083,290.12
  5. Step 5: Solve for x
    x = 2,850,083,290.12/66,162.74
  6. Step 6: Final answer
    x = 43,076.86

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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.