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Finding the Fourth Proportional to 66,502.59, 91,761.03 and 39,647.61

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Solution

The fourth proportional to 66,502.59, 91,761.03 and 39,647.61 is: 54,706.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,502.59 : 91,761.03 = 39,647.61 : x
  2. Step 2: Convert to fraction form
    66,502.59/91,761.03 = 39,647.61/x
  3. Step 3: Cross multiply
    66,502.59x = 91,761.03 × 39,647.61
  4. Step 4: Simplify right side
    66,502.59x = 3,638,105,530.64
  5. Step 5: Solve for x
    x = 3,638,105,530.64/66,502.59
  6. Step 6: Final answer
    x = 54,706.22

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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.