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Finding the Fourth Proportional to 66,502.98, 91,761.54 and 39,647.97

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Solution

The fourth proportional to 66,502.98, 91,761.54 and 39,647.97 is: 54,706.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,502.98 : 91,761.54 = 39,647.97 : x
  2. Step 2: Convert to fraction form
    66,502.98/91,761.54 = 39,647.97/x
  3. Step 3: Cross multiply
    66,502.98x = 91,761.54 × 39,647.97
  4. Step 4: Simplify right side
    66,502.98x = 3,638,158,785.07
  5. Step 5: Solve for x
    x = 3,638,158,785.07/66,502.98
  6. Step 6: Final answer
    x = 54,706.70

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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.