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Finding the Fourth Proportional to 50.73, 75.72 and 45

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Solution

The fourth proportional to 50.73, 75.72 and 45 is: 67.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    50.73 : 75.72 = 45 : x
  2. Step 2: Convert to fraction form
    50.73/75.72 = 45/x
  3. Step 3: Cross multiply
    50.73x = 75.72 × 45
  4. Step 4: Simplify right side
    50.73x = 3,407.40
  5. Step 5: Solve for x
    x = 3,407.40/50.73
  6. Step 6: Final answer
    x = 67.17

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.