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Finding the Fourth Proportional to 50.95, 70.20 and 42.62

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Solution

The fourth proportional to 50.95, 70.20 and 42.62 is: 58.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    50.95 : 70.20 = 42.62 : x
  2. Step 2: Convert to fraction form
    50.95/70.20 = 42.62/x
  3. Step 3: Cross multiply
    50.95x = 70.20 × 42.62
  4. Step 4: Simplify right side
    50.95x = 2,991.92
  5. Step 5: Solve for x
    x = 2,991.92/50.95
  6. Step 6: Final answer
    x = 58.72

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.