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Finding the Fourth Proportional to 75.43, 103.50 and 73.39

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Solution

The fourth proportional to 75.43, 103.50 and 73.39 is: 100.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    75.43 : 103.50 = 73.39 : x
  2. Step 2: Convert to fraction form
    75.43/103.50 = 73.39/x
  3. Step 3: Cross multiply
    75.43x = 103.50 × 73.39
  4. Step 4: Simplify right side
    75.43x = 7,595.87
  5. Step 5: Solve for x
    x = 7,595.87/75.43
  6. Step 6: Final answer
    x = 100.70

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.