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Finding the Fourth Proportional to 82,395.98, 123,392.44 and 74,408.79

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Solution

The fourth proportional to 82,395.98, 123,392.44 and 74,408.79 is: 111,431.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,395.98 : 123,392.44 = 74,408.79 : x
  2. Step 2: Convert to fraction form
    82,395.98/123,392.44 = 74,408.79/x
  3. Step 3: Cross multiply
    82,395.98x = 123,392.44 × 74,408.79
  4. Step 4: Simplify right side
    82,395.98x = 9,181,482,502.01
  5. Step 5: Solve for x
    x = 9,181,482,502.01/82,395.98
  6. Step 6: Final answer
    x = 111,431.19

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.