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Finding the Fourth Proportional to 75.03, 112.47 and 36.45

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Solution

The fourth proportional to 75.03, 112.47 and 36.45 is: 54.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    75.03 : 112.47 = 36.45 : x
  2. Step 2: Convert to fraction form
    75.03/112.47 = 36.45/x
  3. Step 3: Cross multiply
    75.03x = 112.47 × 36.45
  4. Step 4: Simplify right side
    75.03x = 4,099.53
  5. Step 5: Solve for x
    x = 4,099.53/75.03
  6. Step 6: Final answer
    x = 54.64

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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.