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Finding the Fourth Proportional to 74,397.53, 102,668.56 and 40,405.97

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Solution

The fourth proportional to 74,397.53, 102,668.56 and 40,405.97 is: 55,760.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,397.53 : 102,668.56 = 40,405.97 : x
  2. Step 2: Convert to fraction form
    74,397.53/102,668.56 = 40,405.97/x
  3. Step 3: Cross multiply
    74,397.53x = 102,668.56 × 40,405.97
  4. Step 4: Simplify right side
    74,397.53x = 4,148,422,140.95
  5. Step 5: Solve for x
    x = 4,148,422,140.95/74,397.53
  6. Step 6: Final answer
    x = 55,760.22

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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.