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Finding the Fourth Proportional to 66,502.73, 91,761.20 and 39,647.72

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Solution

The fourth proportional to 66,502.73, 91,761.20 and 39,647.72 is: 54,706.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,502.73 : 91,761.20 = 39,647.72 : x
  2. Step 2: Convert to fraction form
    66,502.73/91,761.20 = 39,647.72/x
  3. Step 3: Cross multiply
    66,502.73x = 91,761.20 × 39,647.72
  4. Step 4: Simplify right side
    66,502.73x = 3,638,122,364.46
  5. Step 5: Solve for x
    x = 3,638,122,364.46/66,502.73
  6. Step 6: Final answer
    x = 54,706.36

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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.