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Finding the Fourth Proportional to 55, 75.92 and 50.96

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Solution

The fourth proportional to 55, 75.92 and 50.96 is: 70.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    55 : 75.92 = 50.96 : x
  2. Step 2: Convert to fraction form
    55/75.92 = 50.96/x
  3. Step 3: Cross multiply
    55x = 75.92 × 50.96
  4. Step 4: Simplify right side
    55x = 3,868.88
  5. Step 5: Solve for x
    x = 3,868.88/55
  6. Step 6: Final answer
    x = 70.34

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1.5x scale

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.