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Finding the Fourth Proportional to 50.65, 75.61 and 45.25

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Solution

The fourth proportional to 50.65, 75.61 and 45.25 is: 67.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    50.65 : 75.61 = 45.25 : x
  2. Step 2: Convert to fraction form
    50.65/75.61 = 45.25/x
  3. Step 3: Cross multiply
    50.65x = 75.61 × 45.25
  4. Step 4: Simplify right side
    50.65x = 3,421.35
  5. Step 5: Solve for x
    x = 3,421.35/50.65
  6. Step 6: Final answer
    x = 67.55

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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.