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Finding the Fourth Proportional to 74,979.40, 103,468.42 and 43,149.40

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Solution

The fourth proportional to 74,979.40, 103,468.42 and 43,149.40 is: 59,544.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,979.40 : 103,468.42 = 43,149.40 : x
  2. Step 2: Convert to fraction form
    74,979.40/103,468.42 = 43,149.40/x
  3. Step 3: Cross multiply
    74,979.40x = 103,468.42 × 43,149.40
  4. Step 4: Simplify right side
    74,979.40x = 4,464,600,241.95
  5. Step 5: Solve for x
    x = 4,464,600,241.95/74,979.40
  6. Step 6: Final answer
    x = 59,544.36

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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.