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Finding the Fourth Proportional to 66,494.16, 91,773.81 and 39,638.43

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Solution

The fourth proportional to 66,494.16, 91,773.81 and 39,638.43 is: 54,708.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,494.16 : 91,773.81 = 39,638.43 : x
  2. Step 2: Convert to fraction form
    66,494.16/91,773.81 = 39,638.43/x
  3. Step 3: Cross multiply
    66,494.16x = 91,773.81 × 39,638.43
  4. Step 4: Simplify right side
    66,494.16x = 3,637,769,743.52
  5. Step 5: Solve for x
    x = 3,637,769,743.52/66,494.16
  6. Step 6: Final answer
    x = 54,708.11

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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.