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Finding the Fourth Proportional to 74,418.80, 102,695.80 and 40,425.80

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Solution

The fourth proportional to 74,418.80, 102,695.80 and 40,425.80 is: 55,786.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,418.80 : 102,695.80 = 40,425.80 : x
  2. Step 2: Convert to fraction form
    74,418.80/102,695.80 = 40,425.80/x
  3. Step 3: Cross multiply
    74,418.80x = 102,695.80 × 40,425.80
  4. Step 4: Simplify right side
    74,418.80x = 4,151,559,871.64
  5. Step 5: Solve for x
    x = 4,151,559,871.64/74,418.80
  6. Step 6: Final answer
    x = 55,786.44

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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.