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Finding the Fourth Proportional to 50.19, 74.94 and 45.02

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Solution

The fourth proportional to 50.19, 74.94 and 45.02 is: 67.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    50.19 : 74.94 = 45.02 : x
  2. Step 2: Convert to fraction form
    50.19/74.94 = 45.02/x
  3. Step 3: Cross multiply
    50.19x = 74.94 × 45.02
  4. Step 4: Simplify right side
    50.19x = 3,373.42
  5. Step 5: Solve for x
    x = 3,373.42/50.19
  6. Step 6: Final answer
    x = 67.21

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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.